Burning stuff with a giant fresnel lens + how a DLP projector works 

Clear sunglasses? You mean glasses?

"Why do you need that old tv?" Backyard scientist: "no reason"

Man, I'll be 39 in 2 months. Growing up, a big projection screen tv was so luxury. Everybody wanted to watch it and play games on it. Now I watch a guy taking it apart and passing on knowledge. Great stuff going on here

Should have said "The power of the sun, in the palm of my hand". You even had the goggles for the reference.

Good idea with the glass over your lens. I've had trouble with them fogging up from UV exposure, or the ridges in the lens getting gunked up with dust and moss. The glass should protect from both

What if you made an alt called: ‘TheFrontyardScientist’...

I did this once with a fifty inch. Set pocket change on a concrete stepping stone to melt. Thought it would take a bit so went in the house and made a sandwich, had lunch. When I came back, not only was my change fused but due to the movement of the sun, there was a line of glass where it had melted the concrete. Good times!

youtube: watch a guy "burning stuff with a giant fresnel lens" me: i wonder what will happen if you focus into a solar panel backyardscientist: first i want to overclock a solar panel" i freaking love you dude.

If I don’t have heavy mes- If I don’t have heavy med- *Looks concerned*

You burned a hole in a solar panel. With the sun. Surely there is some poetic irony in there SOMEWHERE. And i'm looking forward to a video on Shopping Cart sailing >:3 I'm just kidding.

The backyard scientist: *melts penny* FBI: you are under arrest for destruction of u.s. currency

Done this, it's super fun and almost instantly chars wood to just straight carbon. If you scrape the burned powder off multiple times you can slowly burn through a 2x4. Also, melting pennies then sliding them into cold water makes some super interesting warped pennies

Heavy Metal poisoning? Is that the thing you get after a Rock concert?

florida man burns solar pannels and posts it online

7:58 when he mentioned grant i shed a tear for that great man

"We should probably wear gas masks" "Nah.. It's just led."

The sun is a deadly laser * *(when focused through a tv size fresnel lens)

Awesome stuff! 😎

The backyard scientist finished off the video by committing a crime with the power of the sun.

I had a little 1 ft square (rigid) Fresnel lens from Edmund Scientific when I was a kid. It would focus the light into a circle about 1/4 inch in diameter, and it would melt bricks and cause pavement to explode. This was much bigger, of course, but I was doing it in the front yard.

More dlp stuff. Please. I work with these projectors and you’re the first person ever to come close to making me understand how they work.

every body a gangster till the fresnel lens start burning

As an AV tech, just dropped in to shout out your (fairly rare) correct pronunciation of the word "fresnel." It was named after someone, after all. Credit where credit's due.

Love your content guys. You are very fun. It was a joy watching your experiements!

Anyone else wish he could make more videos?

Jake : * melts anything My Brain : "TOUCH IT !"

i loved the smoke demonstration showing how it focuses!

Very grateful to learn something new!! I didn't know how a projector works!

My family had a rear-projection tv many years ago. This one had 3 lights in the back - red, blue, and green. One day I learned there was a setting that allowed you to change where each individual light's focal point was, so that if something was off kilter you could adjust it back to where it should've been. After a little tweaking of the red and blue channels, turned it into a pseudo-3D television. Had to have those old-school 1 red lens, 1 blue lens glasses to get it to work and the effect wasn't great since nothing I watched with it was made for 3D, but things did look more three dimensional. At any rate, it was a neat little science experiment.

Hey bro love the videos keep up the good work. I think you're one of the soul RU-vidrs that are able to deliver fun and entertaining video footage while still being educational. Thanks 😊

I love how the light makes the smoke look rainbow 🥰

The smoke and focal point is one of the coolest practical demonstrations I've ever seen.

Clicked so fast i burnt my skin

A couple years ago we ended up with a friend's junk projector TV.. but after not being able to fix it, just ended up throwing it all out.. Now I'm really annoyed we didn't save the big lens thing. damn.

Fighting inflation by melting pennies with a giant old TV magnifier.

Brilliant! Enjoy all your vids. This one's great, green energy!

That smoke demonstration to show the light beam was really good

Florida man harnesses the power of the sun

I made a whole series of this before grant and you, gotta love it! They are fun to play with. You can boil water with it too. Solar cooking with this is a thing as well. I do have a play list on my channel, sadly it did not get 400k views like yours.

Superb experimentation

4.2 million subscribers yet the mic isn’t the best Still love your vids :)

I have an idea, try melting every single metal and mix them together and make a supermetal

Shaving cream cans are great for exploding. I once stuck one in a fire upside down with the top below the coals. Blew the top off of it and it shot up straight like a rocket on a column of foam. Neat!

I love that you use metric units! Proper scientist.

Backyard scientist is a underrated youtuber

Man, you never cease to impress!

Very Fascinating!

i loved your garden !

I coulda watched half an hour of you melting/burning stuff

My notification just popped up I haven’t been this early 👀 much respect from Ireland 🇮🇪

1:57 As he talks the grass catches on fire lol

My brother has a 9x12 magnifying glass tray thing. We were messing around with it outside and we were quite surprised with how strong it was. We burned words into real leather boots, melted the garbage bin, set the grass on fire etc. We weren't expecting it to work so God.

OMG I WAS WAITING FOR AN UPLOAD FROM MY FAV RU-vidR FOR SOOOOOO LONG HERE IT FREAKIN IS

Cool! I've been having fun with one of these solar death rays for a while now. I'll be posting more videos this summer.

What if you stacked like 10 of these in a giant death ray? I imagine it would have to be like 5 meters tall but worth it.

I boiled a 2oz lead fishing weight in under a minute with the fresnel lens out of a Mitsubishi rear projection TV & it would catch wood on fire instantly! I had to keep a blanket over it & store it in my shed because even light coming through the window & hitting it could have started a fire. Mine was that powerful straight out of the TV, you can also polish them to make them reach temperatures above 2000°F!

4/10 of an am.... or 2/5? Reduce your fraction man! Hahahhaha great video!

Thumbs up for RU-vidrs named Kevin 👍

I've been playing with similar lenses on a much smaller scale now I have some ideas thanks

I finally found myself one! So excited

It doesn't make a difference if it's been done before, just make sure you do it better. :-)

7:10 “hold out your hand... it’s quite cool”

Some science for a change, good video!

Doctor Octopus - “The power of the sun, in the palm of my hand”

Nobody: TheBackyardScientist: *harnesses the power of the sun to melt sunglasses and metal*

you should fire your camera assistant, he missed half the shots and the few ones he got right are overexposed.

You lured me with burning things and then you made me learn something! Fiend!

Amazing ! Did you polished the glass at all? What brand and model tv was it ? Thank you very much!

dis mans gonna make a explosive bow

TheBackyardScientist should do a collab with The SlowmoGuys

Laughed so hard when he had the stroke trying to say heavy metal poisoning.

The the last generation of 1080P Mitsubishi DLPs had the absolute best picture out of any televisions out there.

5:41 Dude , if YOU dont have heavy metal poisoning by now then I don't think anyone does !

Nice work

Burning things with sunlight through a giant magnifying glass? *_Archimedes wants to know your location_*

I’m literally the dumbest kid in every one of my classes but I’m addicted to science channels for some reason...

*That's how DLP projector works* _i'm sorry_

Heavy Metal Poisoning? I still think a better band name would be Actinide Series.

*The power of the sun...in the palm of my hand.*

Dude.... If I ever get into bullet casting this looks like a dam efficient way to melt bulk lol

I feel like the suns average power per m^2 In Ireland is like.. 11W/m^2 on a decent day

Why do I feel like I'm still damaging my eyes by looking at the focused sun through my phone...

Dude!! Love your stuff, been watching for years!! So... hey BYS! This is only the second time I’ve ever requested a video from any of my favorite RU-vid folk. So... here’s what I want to see: What happens when you add salt to boiling water? I mean, we all know that salt, water, and ice makes for a colder cold than ice by itself... but... What happens if you add salt to boiling water? How much salt does it take to change the behavior of boiling water? How does that affect the thermal properties or behavior of boiling water? My hypothesis: Since you’re making the water denser, more energy will be spent maintaining the temp of the mass, which means the max temp will drop from 212°F to... say... 190°-200°F. But since it’s denser you’re essentially increasing the surface area of contact with the inner chamber on a molecular level. So if you measure the temp delta over time of the inner chamber with plain and then with salt water in the outer chamber, the salt water will heat it faster and the max inner temp will be closer to the temp of the outer chamber. Possibly the salt water double boiler will exceed the max inner temp of the plain water because of the increased efficiency. Is there a max amount of salt that is effective, or does it turn into diminishing returns as the salinity increases? And does the increased energy use of heating the denser salt water offset the more efficient heat transfer between the inner and outer chambers? What’s the total energy consumption to evaporate 100 ml of frozen water from the inner chamber starting with room temp plain or salt water? Actually that was really fun to write out... 😉 Hope to see it soon!! 👍🏻❤️

He does not get enough attention. He is really underrated.

"Uh, solar panel dust! Don't breathe this!"

"overclocking a solar panel" LTT where ya at?

Pretty sure this is the best video I’ve ever seen.

Amazing content!

Now, imagine taking a screen with a one mile radius to space (outside the Van Allen Belt) and focusing the sun’s UV rays onto a single point the size of the penny. No flames could form, but energy would be HIGHLY concentrated on that single point.

U should build mr freezes gun

glad you gave a shout out to the king of random

Hey could this be applied to desalination as a near-free heat source? For example, a reservoir with a roof made entirely of these built in an ideal location for sunlight sloped with a collection/cooling coil coming from the outside?

6:10 _y e e t_

Explosive bow???😉

8:11 that sound made me laugh way harder than it should have lol (after i left the comment i clicked on the time like ten times in a row and god i have no idea why that was so funny to me but it totally was)

Thanks for using safety equipment (goggles) on this one!

Imagine if you used your powers for good

*I just set things on fire by staring at them.*

Awesome stuff! 😎 -King of Random

“Now let’s try the clear sun glasses” lol bro, those are safety glasses! I enjoy your Florida man creations!