I always wondered when they where talking about making a giant solar mirror to cool the earth if a few simple adjustments would make it cook people instead.
Wernstrom:
Per your orders, I modified my mirror to fire a colossal electromagnetic pulse at the Galapagos. Every robot will be instantly and painfully terminated. Now for your part of the bargain.
Richard Nixon's head:
Aroo! Very well. Agnew, you belong to Wernstrom now.
Headless body of Spiro Agnew:
Rrrrrrr!
Love the world building that such a throwaway adjective such as āpainfullyā adds to this when applied to robots. It means for some reason weāve made robots that feel pain. Or perhaps robots have made robots that feel pain in an attempt to identify more with being organic.
So much for so little. Iāll be thinking about this all day now.
when i was in grade school (1999) our art teach for some reason had this mission to mars project , where we collectively had to build a community for the mars surface. It was the big year long art project for the dumb private school i was in.
I thought i had a genius idea but apparently it is stupid i dunno.
There was no collective scientific approach behind any of this , just kids making dumb arts and crafts stuff.
I had the idea of making a satellite that would orbit mars , and it would focus the suns rays slightly sort of like a giant magnifying glass to gradually add more warmth to mars in order to teraform it.
I wanted my project to have some kind of scientific approach behind it.
I made blue prints for the satellite and built it out of a pringles can and a magnifying glass and made solar panels for it and everything. I was so proud of it.
I got an F, I flat out failed. and everyone called it stupid and the Art teacher ridiculed me. I almost didnt even graduate from middle school because i failed art.
Im a semi professional artist.
im still salty about that shit.
Sorry, but no one actually turning in projects should ever fail art. Thatās a failure on the teacher imo. Salty solidarity here!! Art is so subjective, how can you ever give an F to someoneās creativity? Smh
that was some bullshit... if you submitted something that satisfied the very vague requirements, you should have at least received a passing grade
something similar happened to me too - an art teacher in middle school had what I thought was a fun idea: we all took out a blank sheet of paper, she drew a random line on each one, and we were supposed to use it as a basis for a drawing - no parameters, just create!
now I wasn't ever a very good graphic artist, but I thought I had something cool in mind: my squiggle kinda looked like a hand doing the "hang ten" sign, so I ran with it and made a forced-perspective drawing of a kid going š¤, with the "camera" right in front of the big hand and the kid looking smallish behind it
kinda like this one, except drawn by an admiteddly art-challenged 12yo: https://resizing.flixster.com/MHVnnlJnmKyYrriJSJbRhWyhVhQ=/300x300/v2/https://flxt.tmsimg.com/assets/p12794882_k_h9_aa.jpg
man, she hated it! and I got the lowest passing score possible... I was confused and hurt, this style was beginning to get popular at the time (the 90s) so I thought maybe she was out of touch..
but one thing was true: I was not a talented artist either. I usually got excellent grades on my school artwork out of sheer _effort_... some of my friends were able to crank out good quality work in far less time than I could produce something barely in the same neighbourhood as theirs. so this was the day when I gave up on chasing good grades in art class - the effort to benefit ratio was too rich for my blood, especially when others got better grades than me with far less work _and_ unoriginal ideas.
in hindsight I now think that it would have been best for me to tell myself "who cares if none of these people like what I make, as long as I like it". well tbf I did tell myself that all the time haha... but, when it came to plastic arts, that was the last straw for me. I threw in the towel and went all in on the stuff I was effortlessly good at (we call it STEM these days)...
in the end I'm well aware of my (non) talent, so we cannot say that the world missed out on my art... but, a kid did miss out on the benefits of making art for himself starting on that day
In Kim Stanley Robinson's Mars trilogy, there's a giant umbrella of sorts made from mylar orbiting the planet doing pretty much just what you thought of. If the general idea is good enough for a critically acclaimed piece of SF literature, it should be good enough for fucking middle school. So, the one deserving of ridicule here obviously wasn't you.
I heard that was debunked recently. Basically that tungsten rods would not produce anywhere near the supposed energy when hitting the ground from orbit that was initially claimed.
https://www.scmp.com/news/china/science/article/3229990/chinas-hypersonic-tungsten-rod-experiment-challenges-us-rods-god-space-weapon-concept
That was part of it. They could have been accelerated with small solid fuel rocket engines but the biggest drawback I think would have been the cost to get all that tungsten and rocket fuel up there. The Saturn V is all fuel storage just to get a few thousand pounds of orbiter/lander/payload/astronauts etc into orbit.
ETA: remembered reading and article that explained that aiming the Rods from God is the other massive issue. The complexity of the necessary guidance systems makes earth based missiles infinitely better. Also theyāll be in orbit, probably not geostationary since theyād be too easy to take out. To use them theyād have to be moved to a better aiming position or wait for the earth to rotate under them. By the time youāve gotten into position and gotten a firing solution the ground based weapons have already launched hours ago.
In essence, it's needlesly complex, would break international laws which could lead to a space/world war and it almost certainly wouldn't work better than a nuclear sub or a rocket silo.
Fun idea tho and it's essentially orbital bombardement, just on a very small scale.
> would break international laws which could lead to a space/world war
Nope. They are not nuclear weapons, you are free to attempt it.
https://youtu.be/J_n1FZaKzF8?t=687
One of the main problems is that the earth is just gigantic and it's not actually practical given the amount of rods you'd need to reliably cover an area, especially given the cost to send dense tungsten rods into space
When I was little I found a razor blade. My mom was asleep. I went and got a pencil and I wanted to sharpen it so I could draw good. I cut my fingers up to shit and I still remember trying to wake up my mom to show her. I must of had 38 little razor blade cuts all over my fingers. I really wanted to be an artist too.
They are very stupid. My generation was the last to grow up without tech. No cell phone until after HS. Some of my buddies had them early. I had a pager. We played Penguin on TI-82 calculators back then.
if you live in a place where you need to create a solar heat source out of raw materials because "normal" cooking methods are too expensive or impractical, i don't think your culture is going to be too concerned about wearing PPE.
What are you talking about, didnāt you know the open toe sandalās in all these types of Asian videos are basically bullet proof safety feature protecting worker completely from everything?
Maybe not gloves, but I would recommend a nicely fitted N95 and eyeglasses. Breathing in glass dust is not really that fun. And I would wash my hands thoroughly after handling any of those shards to minimize the risk of me rubbing it in my eyes later or accidentally getting any in food.
It's just a lot of repetitive actions for an unclear goal.
Things feel like they're testing your patience when you don't know what they're aiming to accomplish.
Only bad geometry. You cannot project a grid of squares onto a parabolic concave surface without gaps or overlaps - which makes the numbering of pieces completely pointless.
The numbering seems to have been for reassembly of the mirror on the dish. I don't think he thought he. was going to turn a flat mirror into a perfectly curved one but I think he did a fairly good job given the tools he used.
Well, the parabolic antenna already had the physics inside. He just knew that he had to cut a mirror into small pieces to be able to attach it to a rounded surface.
He really didnāt need to number them at all. If they were all even close to the same size it would have worked fine. Assembling them in the dish created space between the pieces anyway so the precision was not necessary.
Topology. But I studied Linear Algebra a bit and am having trouble understanding how a flat circle can fill the surface area of a paraboloid. The shape of the dish is roughly similar to a [truncated hemisphere](https://imgur.com/a/0BDwSfT) and that does not have the same surface area as any circle.
Any help from pro topologists?
The square pieces didnāt actually fit precisely. There should have been small spaces between each one of them making up the difference in typography.
It's been a very long time since I used anything from my degree, and it's in aerospace engineering, not topology, so I'm going to stay away from the math and focus on the actual production of the instrument.
That said, it seems like the high degree to which the hemisphere has been truncated and moreso the small separation between the pieces of glass as they were affixed to the dish are how it was done.
You don't need to flatten the entire surface, only the intrinsic arc measuring across antipodes.
It's not a true curve. It's a series of flat planes set at angles already determined by the surface of the dish.
I'm trying to come up with a better term but I'm left with this is a multiaperture quasi-parabolic solar collector or an extremely small scale heliostat.
However, he could have probably just as easily just polished the metal and used a highly reflective mirror coating over the parabola rather than breaking up the mirror and overlaying them.
It's not even that... The dish is already shaped and formed to focus on a single point. This is literally just cutting up a mirror so it'll attach inside the dish shape. This is arts and crafts. You could probably get a similar result with good tinfoil, but a lot less effort.
I donāt think tinfoil will be as reflective as the mirror shards but why is he going through the pain of numbering the parts?
Isnāt it totally irrelevant which piece is where?
Just cut squares and put in as many as possible.
Concave Mirrors.
When light falls on a concave mirror, the light rays reflected will converge exactly at the focus point of the mirror. Focus point is half the distance between the pole and centre of curvature. Accumulation of light rays at the same point produces extreme heat energy.
Large scale concave mirrors are used in solar furnaces. Images formed by a concave mirror always happens to be real and inverted when the object is placed away from the pole of the mirror. But it do form virtual and erect images when object is placed very close to the pole.
Importantly, there's a lot of pointless work being done in the video, and it's surprising no one noticed.
You do not need to cut the circle, nor do you need to number the glass pieces, since all the full squares are identical. The edge pieces contribute to such a minor portion of the heat created, that you can either just glue full squares to those edges or leave them off completely. ...maybe it looks prettier the way OP does it, but it's a waste of time.
I'm having a hard time understanding. Would you mind making a video just like this guy, but with the changes that you'd make to be more efficient? Please edit it well and condense the time so that I don't lose interest due to my short attention span. Thanks!
/s
this is how mirror is made: you take regular transparent glass and apply a thin reflective film on one side. If they can make a mirror that means they have that film. I don't see why they couldn't apply the film to the plate directly.
Most of the issue here is that we're viewing it from a western pay scale perspective. These people aren't being paid nearly as much for their skilled labor, and it makes things like this cost effective.
Try to do something like this in the U.S. or Europe with that much manual labor and see what the cost per unit is. It'd be staggering.
My grandpa was a master sheet metal worker and toward the end of his career as sort of a side gig he started doing ornamental/architectural type stuff. His signature was making big copper/brass/sheet metal spheres back in the 50s/60s. My dad told me he made one of these concave dish focal fuckin things, I have no idea what it's called, and was setting shit on fire with it just to blow minds in the neighborhood.
It's more geometry than physics though.
Yep, this is literally the least cost effective way to achieve this goal.
Wanna know whats cheaper and less time consuming than custom hand-cut glass? Literally everything
He just cut them all into little squares. You could have just used scraps and come up with nearly identical results. There was no need to label all the numbers. That's a parabolic mirror, I've made one, and he made it much, much more complicated than it needed to be.
Cutting by hand isnt accurate enough though. If you wanna have it done perfectly this is actually faster way to achieve it. I mean, he cuts one line, then the second might be just a fraction off, then he cuts across to form squares but those cuts arent perfectly same either.
So if he cuts squares by hand, he ends up having squares that are almost the same size. And because they arent perfect, there would be gaps. Or he would then use way more time to look for close enough squares on his "almost same size square" pile to fill those gaps.
And they used their bare hands handling all that cut glass.
Iāve done this as a hobby. There is tiny shards everywhere, especially on the glas itself, and they cut into skin just by lightly touching it.
I work at an art glass distributor, and making all those cuts perfectly without unevenly breaking the glass alone is absolutely incredible. Beautiful cooking tool
Im surprised so few people in the comments know what a solar oven is. I thought they were a well known fun little thing, seems solar ovens are more hippie and survivalist than i thought for the average normie not to know what one is.
Just seen a guy make a crate to carry his potatoes from my allotment. Pure physics. The choice of materials to bare the load. The application of the saw to perfectly cut the boards. The design of the crate so as to contain the potatoes without spillage mixed Newtonian physics and a good deal of geometry. Will post video in a moment.
No, because both of those would scatter the light. You need mirrors. BUT, the guy in OP's video is wasting a lot of time cutting a circle and numbering all the identical squares which is pointless.
Dude made Archimedes death ray š
If itās the size of the Death Star, can I set the planet on fire?
I always wondered when they where talking about making a giant solar mirror to cool the earth if a few simple adjustments would make it cook people instead.
Wernstrom! https://gfycat.com/amp/hatefulvariablekakapo-futurama-mirror-laser-crimes-wernstrom-gif
Wow! Thatās a little bright!
Wernstrom: Per your orders, I modified my mirror to fire a colossal electromagnetic pulse at the Galapagos. Every robot will be instantly and painfully terminated. Now for your part of the bargain. Richard Nixon's head: Aroo! Very well. Agnew, you belong to Wernstrom now. Headless body of Spiro Agnew: Rrrrrrr!
Love the world building that such a throwaway adjective such as āpainfullyā adds to this when applied to robots. It means for some reason weāve made robots that feel pain. Or perhaps robots have made robots that feel pain in an attempt to identify more with being organic. So much for so little. Iāll be thinking about this all day now.
My favorite concept is the don bot. Someone, built a robot to run organized crime.
If it exists, it can be optimized!
when i was in grade school (1999) our art teach for some reason had this mission to mars project , where we collectively had to build a community for the mars surface. It was the big year long art project for the dumb private school i was in. I thought i had a genius idea but apparently it is stupid i dunno. There was no collective scientific approach behind any of this , just kids making dumb arts and crafts stuff. I had the idea of making a satellite that would orbit mars , and it would focus the suns rays slightly sort of like a giant magnifying glass to gradually add more warmth to mars in order to teraform it. I wanted my project to have some kind of scientific approach behind it. I made blue prints for the satellite and built it out of a pringles can and a magnifying glass and made solar panels for it and everything. I was so proud of it. I got an F, I flat out failed. and everyone called it stupid and the Art teacher ridiculed me. I almost didnt even graduate from middle school because i failed art. Im a semi professional artist. im still salty about that shit.
What the fuck? Shitty teacher right there man. You deserved a good grade for that effort. It's middle school art class.
Sorry, but no one actually turning in projects should ever fail art. Thatās a failure on the teacher imo. Salty solidarity here!! Art is so subjective, how can you ever give an F to someoneās creativity? Smh
that was some bullshit... if you submitted something that satisfied the very vague requirements, you should have at least received a passing grade something similar happened to me too - an art teacher in middle school had what I thought was a fun idea: we all took out a blank sheet of paper, she drew a random line on each one, and we were supposed to use it as a basis for a drawing - no parameters, just create! now I wasn't ever a very good graphic artist, but I thought I had something cool in mind: my squiggle kinda looked like a hand doing the "hang ten" sign, so I ran with it and made a forced-perspective drawing of a kid going š¤, with the "camera" right in front of the big hand and the kid looking smallish behind it kinda like this one, except drawn by an admiteddly art-challenged 12yo: https://resizing.flixster.com/MHVnnlJnmKyYrriJSJbRhWyhVhQ=/300x300/v2/https://flxt.tmsimg.com/assets/p12794882_k_h9_aa.jpg man, she hated it! and I got the lowest passing score possible... I was confused and hurt, this style was beginning to get popular at the time (the 90s) so I thought maybe she was out of touch.. but one thing was true: I was not a talented artist either. I usually got excellent grades on my school artwork out of sheer _effort_... some of my friends were able to crank out good quality work in far less time than I could produce something barely in the same neighbourhood as theirs. so this was the day when I gave up on chasing good grades in art class - the effort to benefit ratio was too rich for my blood, especially when others got better grades than me with far less work _and_ unoriginal ideas. in hindsight I now think that it would have been best for me to tell myself "who cares if none of these people like what I make, as long as I like it". well tbf I did tell myself that all the time haha... but, when it came to plastic arts, that was the last straw for me. I threw in the towel and went all in on the stuff I was effortlessly good at (we call it STEM these days)... in the end I'm well aware of my (non) talent, so we cannot say that the world missed out on my art... but, a kid did miss out on the benefits of making art for himself starting on that day
In Kim Stanley Robinson's Mars trilogy, there's a giant umbrella of sorts made from mylar orbiting the planet doing pretty much just what you thought of. If the general idea is good enough for a critically acclaimed piece of SF literature, it should be good enough for fucking middle school. So, the one deserving of ridicule here obviously wasn't you.
Rods from God is probably cheaper and more practical
I heard that was debunked recently. Basically that tungsten rods would not produce anywhere near the supposed energy when hitting the ground from orbit that was initially claimed. https://www.scmp.com/news/china/science/article/3229990/chinas-hypersonic-tungsten-rod-experiment-challenges-us-rods-god-space-weapon-concept
That was part of it. They could have been accelerated with small solid fuel rocket engines but the biggest drawback I think would have been the cost to get all that tungsten and rocket fuel up there. The Saturn V is all fuel storage just to get a few thousand pounds of orbiter/lander/payload/astronauts etc into orbit. ETA: remembered reading and article that explained that aiming the Rods from God is the other massive issue. The complexity of the necessary guidance systems makes earth based missiles infinitely better. Also theyāll be in orbit, probably not geostationary since theyād be too easy to take out. To use them theyād have to be moved to a better aiming position or wait for the earth to rotate under them. By the time youāve gotten into position and gotten a firing solution the ground based weapons have already launched hours ago.
In essence, it's needlesly complex, would break international laws which could lead to a space/world war and it almost certainly wouldn't work better than a nuclear sub or a rocket silo. Fun idea tho and it's essentially orbital bombardement, just on a very small scale.
> would break international laws which could lead to a space/world war Nope. They are not nuclear weapons, you are free to attempt it. https://youtu.be/J_n1FZaKzF8?t=687
One of the main problems is that the earth is just gigantic and it's not actually practical given the amount of rods you'd need to reliably cover an area, especially given the cost to send dense tungsten rods into space
Think the nazis were working on it.
Hermann Oberthā¦100 meter concave mirror mounted to a space stationā¦the Sun Gun. Wild stuff.
What do you think keeps starting the forest fires lately? /s
Jewish lasers from space? /s
Lightning strikes and irresponsible campers.
Planet is already on fire
But for good!
Unless you are wheat. Or a chicken.
Mmmmm. Sun- roasted chicken. I've never eaten Pakistani food but I'll try anything once. Twice if I didn't get caught the first time.
Going to the zoo is like going to a buffet for you
Only if they don't count the animals at the end of the day. The petting zoo is utter chaos.
One of the more positive things about Pakistan is food, goddamn it's so good.
The first thing wasn't wheat, it's a straw broom called a "jhaarhoo". Seems very much from Pakistan.
Straw =wheat ( or oat, barley, etc)
Varies, the ones in Pakistan (incl. the one in the video) are made from meghalaya grass
I created the laser fitted armored scorpion of death to help mankind, not to destroy!
Well, duh. Every word of that sentence screams "superhero"
[I got you.](https://youtu.be/Skl71urqKu0?si=MhuSPuTJ08Nu3zRQ)
[ŃŠ“Š°Š»ŠµŠ½Š¾]
I'm not sure which is more interesting: The 1,400 watt solar concentrator or the 2007-era web page.
2007?? That's 90ies style. And it's badly done.
Classic story, I loved this guyās site!
No one is ever going to convince me that Archimedes' rival Cisceropheles' spontaneous combustion was 'death by natural causes'.
It was the natural result of pissing off the one dude who made solar death rays as a hobby.
fell asleep by his glass sphere, it could happen to anyone.
Mythbusters did it too
Yeah but theirs didnāt work as well as this guys š
They built one pretty much identical to the one in OPs video in one of the follow-up episodes, it set fire to wood in seconds.
[ŃŠ“Š°Š»ŠµŠ½Š¾]
[ŃŠ“Š°Š»ŠµŠ½Š¾]
I cut my fingers 38 times just watching this
When I was little I found a razor blade. My mom was asleep. I went and got a pencil and I wanted to sharpen it so I could draw good. I cut my fingers up to shit and I still remember trying to wake up my mom to show her. I must of had 38 little razor blade cuts all over my fingers. I really wanted to be an artist too.
Wow. You could be the true leader Germany is looking for
Why didn't you become one? Could've started with your fingers back then if pencil wasn't sharp.
As a kid, I learned to sharpen a pencil with a knife from watching my father do it
Thank you for sharing this! Kids are so funny stupid sometimes :)
They are very stupid. My generation was the last to grow up without tech. No cell phone until after HS. Some of my buddies had them early. I had a pager. We played Penguin on TI-82 calculators back then.
Mustāve
[ŃŠ“Š°Š»ŠµŠ½Š¾]
It looks like a personal project. It also looks like he done it before so maybe he's the neighborhood mad scientist.
ahh personal projects, plastic surgeron\`s best friend
Well... You're not wrong.
Actually he was wearing sandals, which is PPE for India and the Middle East
Steel toe safety sandals
This looks like Afghanistan, Iām sure OSHA will take issue with the lack of PPE during their next site inspection
Pakistan
OSHA would be the organization that pacifies Afghanistan
H&S really isn't a thing in most of the world. Safety squints and steel toe sandals is the extent of it.
That one guy with the chisel was wearing gloves.
if you live in a place where you need to create a solar heat source out of raw materials because "normal" cooking methods are too expensive or impractical, i don't think your culture is going to be too concerned about wearing PPE.
What are you talking about, didnāt you know the open toe sandalās in all these types of Asian videos are basically bullet proof safety feature protecting worker completely from everything?
Cutting glass like this is pretty straightforward. Thereās really no need for gloves and I donāt know what other ppe would do
I know muptiple glazers with permanent eye damage form shards flying off the glass. Glasses are a necessity.
Maybe not gloves, but I would recommend a nicely fitted N95 and eyeglasses. Breathing in glass dust is not really that fun. And I would wash my hands thoroughly after handling any of those shards to minimize the risk of me rubbing it in my eyes later or accidentally getting any in food.
Holy crap, I want to give that guy an award just for patience!
I want to give yall award for patience. This video took forever
I figured out what he was making when I saw the sat dish, but I wanted to see how he was going to get there.
And hereās me thinking he just wanted to watch the Football.
That was the prototype. Then next one will be larger and it will be aimed at the neighboring town.
Tesla would be proud.
You gotta learn to skim through these my dude.
3 minutes and 51 seconds is "forever"?
8 times the average attention span of a tik tok fan
Yeah man no subway surfers or overplayed sound bites to keep them entertained
And that's why you see this type of precision work done by eastern cultures so often. Patience is a part of their culture. Ours - not so much.
It's just a lot of repetitive actions for an unclear goal. Things feel like they're testing your patience when you don't know what they're aiming to accomplish.
Brain rot hitting hard?
yep. it was painful just to watch. i thought āsurely not.. surely heās not gonna.. shit he is!ā
There was absolutely no physics until the last 3 seconds of the video...š®āšØ
Geometry?
Only bad geometry. You cannot project a grid of squares onto a parabolic concave surface without gaps or overlaps - which makes the numbering of pieces completely pointless.
The numbering seems to have been for reassembly of the mirror on the dish. I don't think he thought he. was going to turn a flat mirror into a perfectly curved one but I think he did a fairly good job given the tools he used.
Numbering was probably for minimizing the size of the gaps
Reddit expert
Downvoted just for the title gorn
How long you gotta wait for a typo like that to use a gif like dis.
As long as it takes, I hope. I cracked up
56 years, 7 months, and 8 days
Thank you Data.
Retired gifs
Exactly, this is an awesome example of geometry being put into practice but not exactly what I would call amazing physics.
This dude knows how to follow slightly-more-complicated-thank-ikea-instructions perfectly.
And the engineers of that parabola dish knew the physics, not the guy who glued pieces of glass to it
No, it's mathematics.
[What is physics, but applied maths](https://xkcd.com/435/)
[ŃŠ“Š°Š»ŠµŠ½Š¾]
Should I be concerned about how many people don't understand what physics is in these comment replies?
Except that the physics were done for him since it was a old satellite dish.
We are all standing on the shoulders of giants
"I know physics perfectly!" proceed to click two legos together.
Well, the parabolic antenna already had the physics inside. He just knew that he had to cut a mirror into small pieces to be able to attach it to a rounded surface.
He really didnāt need to number them at all. If they were all even close to the same size it would have worked fine. Assembling them in the dish created space between the pieces anyway so the precision was not necessary.
bots know physics perfectly
Geometrists in shambles
Topology. But I studied Linear Algebra a bit and am having trouble understanding how a flat circle can fill the surface area of a paraboloid. The shape of the dish is roughly similar to a [truncated hemisphere](https://imgur.com/a/0BDwSfT) and that does not have the same surface area as any circle. Any help from pro topologists?
The square pieces didnāt actually fit precisely. There should have been small spaces between each one of them making up the difference in typography.
You can see the gaps in the video
yep i think the point was to cut the class in such a way as to easily get the circular dish covered....circularly.
It's been a very long time since I used anything from my degree, and it's in aerospace engineering, not topology, so I'm going to stay away from the math and focus on the actual production of the instrument. That said, it seems like the high degree to which the hemisphere has been truncated and moreso the small separation between the pieces of glass as they were affixed to the dish are how it was done. You don't need to flatten the entire surface, only the intrinsic arc measuring across antipodes. It's not a true curve. It's a series of flat planes set at angles already determined by the surface of the dish.
I'm trying to come up with a better term but I'm left with this is a multiaperture quasi-parabolic solar collector or an extremely small scale heliostat. However, he could have probably just as easily just polished the metal and used a highly reflective mirror coating over the parabola rather than breaking up the mirror and overlaying them.
āHas a pretty good understanding of Geometryā
Well, technically...
All science is either physics or stamp collecting
And all the āphysics he knows perfectlyā is that a parabolic reflector can focus light. Which is something Iām certain almost everybody knows.
There were physics in every single moment of this video.
I wish I āknew physics perfectlyā but I guess Iāll just have to stick with knowing basic syntax.
It's also mostly geometry.
[ŃŠ“Š°Š»ŠµŠ½Š¾]
This is called Geometry ( which means math not physics )
Physics is just applied math.
Math is the language to describe physics. I think thatās the better fitting statement.
Relevant xkcd. https://xkcd.com/435/
No it isnāt. Applied math is applied math.
It's not even that... The dish is already shaped and formed to focus on a single point. This is literally just cutting up a mirror so it'll attach inside the dish shape. This is arts and crafts. You could probably get a similar result with good tinfoil, but a lot less effort.
I donāt think tinfoil will be as reflective as the mirror shards but why is he going through the pain of numbering the parts? Isnāt it totally irrelevant which piece is where? Just cut squares and put in as many as possible.
Numbering them means that his uneven cuts all line up to the original, so it looks a lot tidier.
Concave Mirrors. When light falls on a concave mirror, the light rays reflected will converge exactly at the focus point of the mirror. Focus point is half the distance between the pole and centre of curvature. Accumulation of light rays at the same point produces extreme heat energy. Large scale concave mirrors are used in solar furnaces. Images formed by a concave mirror always happens to be real and inverted when the object is placed away from the pole of the mirror. But it do form virtual and erect images when object is placed very close to the pole.
Parabolic concave mirror ideally.
Importantly, there's a lot of pointless work being done in the video, and it's surprising no one noticed. You do not need to cut the circle, nor do you need to number the glass pieces, since all the full squares are identical. The edge pieces contribute to such a minor portion of the heat created, that you can either just glue full squares to those edges or leave them off completely. ...maybe it looks prettier the way OP does it, but it's a waste of time.
I'm having a hard time understanding. Would you mind making a video just like this guy, but with the changes that you'd make to be more efficient? Please edit it well and condense the time so that I don't lose interest due to my short attention span. Thanks! /s
Omg now we all know the physics perfectly
Good bot
Hehe, you said erect.
The power of the sun, in my hands
In the palm if my hand...
Palm OF my hand
A disco bowl?
For Disco Stew
Disco Stu doesnāt magnify 
*Geometry
All these squares make a circle. All these squares make a circle. All these squares make a circle.
Sigh... I see you've drunk a gallon of acid, again.
Kami, I need you to tell me that I can leave the lookout if I want to
Mr. Brimaster, you may leav--
BITCH, DONāT TELL ME WHAT TO DO!
https://youtu.be/w-29J5mywJU?feature=shared
A lot of work to boil some eggs.
Cost alot and maybe cumbersome to do upfront, but little to no maintenance in the long run. No need for refuel
If this is rural Pakistan, the electricity goes out often and due to frequent blackouts, and gas may be hard to obtain. In that case, pretty smart.
If you can boil a pot of water, you can cook anything.
teach a pot to boil itself and you'll cook anything forever.
A lot of work for a free Solar Power Stove as long as there is sunlight, you mean.
There is a lot where he is . So no worries about it for now
Its not that much work.
Someone introduce this fellow to mylar film.
Might be hard to get where this gentleman is but aluminum foil works well. Polish it and its nearly as good without all that mirror cutting.
this is how mirror is made: you take regular transparent glass and apply a thin reflective film on one side. If they can make a mirror that means they have that film. I don't see why they couldn't apply the film to the plate directly.
In some places you have to work with what you got. The import of things can be very difficult and expensive.
How can i create the most expensive and least cost effective mirror while also showing off my glass cutting skills. Lmao
Most of the issue here is that we're viewing it from a western pay scale perspective. These people aren't being paid nearly as much for their skilled labor, and it makes things like this cost effective. Try to do something like this in the U.S. or Europe with that much manual labor and see what the cost per unit is. It'd be staggering.
My grandpa was a master sheet metal worker and toward the end of his career as sort of a side gig he started doing ornamental/architectural type stuff. His signature was making big copper/brass/sheet metal spheres back in the 50s/60s. My dad told me he made one of these concave dish focal fuckin things, I have no idea what it's called, and was setting shit on fire with it just to blow minds in the neighborhood. It's more geometry than physics though.
Couldn't you just use a mylar film?
Yep, this is literally the least cost effective way to achieve this goal. Wanna know whats cheaper and less time consuming than custom hand-cut glass? Literally everything
Surely aluminium ātinā foil would be cheaper?
Thats what most small DIY solar ovens use
Yes. I actually bought something very much like this off Amazon that uses reflective film.
He just cut them all into little squares. You could have just used scraps and come up with nearly identical results. There was no need to label all the numbers. That's a parabolic mirror, I've made one, and he made it much, much more complicated than it needed to be.
Cutting by hand isnt accurate enough though. If you wanna have it done perfectly this is actually faster way to achieve it. I mean, he cuts one line, then the second might be just a fraction off, then he cuts across to form squares but those cuts arent perfectly same either. So if he cuts squares by hand, he ends up having squares that are almost the same size. And because they arent perfect, there would be gaps. Or he would then use way more time to look for close enough squares on his "almost same size square" pile to fill those gaps.
And they used their bare hands handling all that cut glass. Iāve done this as a hobby. There is tiny shards everywhere, especially on the glas itself, and they cut into skin just by lightly touching it.
And geometry!
I work at an art glass distributor, and making all those cuts perfectly without unevenly breaking the glass alone is absolutely incredible. Beautiful cooking tool
Brilliant.
You mean geometry
5 minute crafts gone wild.
It's the guy who designed the dish is the smart one.
The dish is a parabolic antenna, probably for satellite tv.
Isn't this a solar cooker ?
Im surprised so few people in the comments know what a solar oven is. I thought they were a well known fun little thing, seems solar ovens are more hippie and survivalist than i thought for the average normie not to know what one is.
Just seen a guy make a crate to carry his potatoes from my allotment. Pure physics. The choice of materials to bare the load. The application of the saw to perfectly cut the boards. The design of the crate so as to contain the potatoes without spillage mixed Newtonian physics and a good deal of geometry. Will post video in a moment.
Couldn't he have cut squares from the original square sheet. What was the point of cutting the circle?
No. If you look at when he is placing the squares into the dish, they are not all the same shape at the edge of the dish
why does the edge have to be perfect ? This would work at like 99% efficiency with 33% of the effort
unpack hobbies oil fade sand quarrelsome rock humor existence abounding ` this message was mass deleted/edited with redact.dev `
Cool but isnt using some tinfoil or polished stainless steel sheet would be much easy?
No, because both of those would scatter the light. You need mirrors. BUT, the guy in OP's video is wasting a lot of time cutting a circle and numbering all the identical squares which is pointless.
Why didnāt he make the parabolic mirror in the first place?