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This rock is so cool! Download TEMU App to get $100 coupon bundle: temu.to/m/ugsqs5t685d Or Search my code [dkm5733] to claim the offer!!（for all users）
yoo im a big fan
how did you make that comment 20 hours ago
you'll regret this.
Do your research when you take sponsorships
@@omatic_opulis9876 Regret what?
How does it taste tho
It tastes like whatever's directly below it.
a
hmmm now i dont think i'll be able to sleep
It tastes like chicken
F
Ohh no! Not Temu!
That's what I also thought ahaha
Context?
yub, chinese buying american ass with green papers
@@anketmohadikar8767 buy it cheap, buy it twice, they say. You know that nice green shirt you bought 90% off? On those sites not only it's been woven in countries where workers' lives do not matter, that bright green colour could also be toxic... If it is so cheap it cannot be good... in sooo many ways...
For real. Was so disappointed
When you broke the TV stone all I could think was: reminds me of asbestos, hold your breath, don't breathe in the fibers.
Yeah, looks a lot like it with all those fibers
Same here
Exactly what I was thinking
I also immediately thought of asbestos…
"don't breathe this"
The term "television stone" reminds me of "slow glass"; an idea in a science fiction story, 'The Light of Other Days' (1966) by Bob Shaw, in which there is glass through which light travels so slowly it allows you to see back in time!
Oh the ending to that story was sublime. It’s been many years since I read it. Every now and then I remember it. Thank you for today’s reminder!
Man, I remember reading that! Hadn't thought about it for years. Great story, will get it on Kindle asap!
Wow, what a great idea....
The only way you can see anything is backwards in time.....
@@Scapeonomics Procedurally correct: The best kind of correct
5:50 Temu are the Spam Kings
i never bought anything from them. the UX on their site is too bad. imagine you try to walk into a store and look at a product but all the employees aggressively try to distract you with unrelated stuff. i'd run out of that store.
I would never buy from these shitty spies. Aliexpress for the win ‼️
SponsorBlock is critical. Without it, I'd have quit youtube entirely by now.
And thanks to vsauce I know the coolest thing this rock can do: show you the sun even through heavy clouds. because the sun's light is parallel there'll be a brighter area visible on the stone when you point it at the sun, than when you point it at any of the diffuse light that the rest of the clouds have
Isn’t this rock the one sailors used to use so they could orient themselves?
So now I know what is the "sun rock" they show on vikings thx
So basically it works like a reverse solar filter?
Which video is this
@@jonasjarboe2627 I have no idea, it's been way too many years, sorry.
"they do *feel* cheaper, and that's because they *are* cheaper" i lost it
He could literally tell he was holding garbage, yet he still promoted it. No integrity at all.
@@dompan9169 A lot of stuff which feels or seems higher-quality has been toxic to me. Something I'm allergic to, I guess.
@@dompan9169 no integrity would be if he claimed it’s high quality
Imagine a box of Legos made out of this, and needing to walk across the floor after dropping the box.
Nightmare fuel...
lay on the floor, put your eye at the lowest possible level, and look around the floor. All lego parts stick up and you can easily see them.
Of all the gifts bestowed upon humanity, It was imagination that was the greatest But we were deemed to imagine the most abhorrent atrocities
@@KafshakTashtak I did and it's in my eyes! Oh no, I have television eyes.
nightmare difficulty
There is a company that fuses a bundle of fiber optic strands, heats them up and stretches the middle, then cuts them at the thin point. After this the polish the ends and it does the same thing, but scales the image. Due to the fact that the light is amplified with the same ratio the image doesn't get dim. No idea if they are still made, but looked like magic
Do you have any names of the product of company? That sounds intriguing
@@Yugemostsuj fiber optic taper appears to be the name. I can't share any details, sorry
@@Yugemostsuj Optical Taper, and they come up on ebay occasionally. Edmund optics used to sell a small one for a few hundred dollars.
Just google TV Rock I got mine from Crystalline Earth Shop and I love it@@Yugemostsuj
I saw something like this at a science museum. They also put a twist in the middle, so the image would be inverted.
1:25 "They're actually hair-like fibers" *Smashes asbestos
It's not asbestos.
@@a.karley4672 It's the fibres that are the worry, whatever its called.
It's alkali metal borate. Could be poisonous in giant amounts, but tiny fibres of it will just dissolve in your lungs and basically disappear. Asbestos, carbon fibre, and other problematic materials just sit there.
Did some research and powdered ulexite can in fact not only contain asbestos but small amounts of boron, so yeah, definetly not great to do
@@loglad5394 CAN, but it isn't asbestos itself. Small amounts of asbestos aren't scary; it's mainly dangerous in occupational-exposure quantities. i.e. large amounts over months or years. Likewise these amounts of boron are just a total non-factor.
1:30 "Look at this cool rock. Now let's smash it!" 😅
My entire soul was crushed, when I saw this part. Just like this cool rock.
Nooooooo!!!!!!!
I appreciate the pace of your videos because their basically always like "Ok yeah but why?" and then you go one layer deeper, and deeper. Always learn a lot watching them.
My brain: why don't we use this stuff for phone screens? Action lab: (whacks stone with wooden dowel and shatters it into a million pieces) My brain: "fair enough"
sooooooooooo, the same as a normal phone screen?
I've had a chunk of this stone for 25 years. I never once knew about the laser property. Awesome!
"The sky is falling!" "It hit me on the head, and it looked like a stop sign!"
When he started to break it, my mind went NOOO for a second
I'm a design engineer, quite into physics. Most KZhead channels cover things either too basic and known to me or are purely technical but without much fun. You, Sir, manage to amaze me with your amazing little experiments and "magic" materials! Thank you!
video was great up until 4:53
Television stone sounds like a funny name. I wonder why they did not call it a chameleon rock. 😂
A big unknown: why someone that investigates all these subjects doesn't do the same with the sponsors?
It took me a few seconds to understand what you meant, but … 100%. I was shocked to see such a nice guy promoting this diabolic company.
Same! I can't understand it :(
Cool stuff. I work with similar but tapered fiber optic blocks to optically couple an x-ray scintillator screen to an array of camera chips. It's pretty amazing the amount of resolution we can get out of such blocks.
I imagine if they can grow this synthetically there'd be SOME sort of application with it and screens. Screens in bathroom tiles or kitchen counters or something.
Er, it'd still need a screen underneath it
@@TechnoMinarchistBall yeah why wouldnt they just use glass hahahahaha
@@Soddus. Because glass works differently, exactly as explained in the video. A countertop made of this stuff would look like the image is coming off the countertop itself. With glass, it would look like you had a screen on top of your countertop. With a thin backing screen that had the same backing behind it as the rest of the counter, you'd have a section of countertop that looked identical to the rest when it wasn't displaying an image and would look like the surface itself was a screen rather than a layer of glass.
You can achieve the exact same effect with mirrors and lenses
They have synthetic versions, blocks of fiber optics. And they are used, most notably in fighter jets. But its very expensive so it's not often used unless budget isn't a concern like in the military
Please dont Support temu. Its realy not good .
elaborate why
@@legioningslave labour and shady business practices
@@alexcsirkovics603 damn wtf
@@legioning The simple fact that noname companies sell there you are just waranteed to get sold trash.
Yeah I won't support anyone who advertises or uses it.
I'm a nerd and I studied engineering and yet... yet... I always learn so much from your quick and simple lab stuff, so glad you're inspired to share it (I'm sure KZhead revenue helps but I can tell you just genuinely love it)
We are not Nerds.... Why you call us that? That's so 80s
I said I'm a nerd :p, and I'm from the 80s@@MitzvosGolem1
@@zachhoy I am not and went to MIT engineering . We are not all nerds That term early on made it "not cool" to study become educated in America in 70s to 80s . Bizarre
@@MitzvosGolem1 The term nerd is not at all negative, what are you on about?
@@Wave1dave it was when I was a kid and in university . Like " Geek".. Not all educated people are nerds or geeks . 🤔
sorry but disliking for promoting TEMU!!
Ye
LOL, you really commented that 😂
Cry me a river snowflake😂😂
Second that! Very disappointed for this channel taking money and legitimizing this company.
Wow a dislike, that nobody can see or know about. Wow...very tough. 😂
Really captivating demonstration of ulexite's optical properties and total internal reflection. It's fascinating how nature has had its own version of a 'fiber optic cable' all along.
The most interesting mineral arrangement I've had explained to me ever. Very well done!
It’s so weird to me that the circles are perfect coming through the stone. Literally perfect
They aren't perfect circles in the stone though I think. They are more like polygon based. Like hex or so because of quartz formation 😊
One thing you said wrong. Critical angle is not “ when 100% light gets reflected”. It is when the angle of refraction is 90 degrees. Light rays just move on the surface touching it. Most of the light gets reflected. Above critical angle, be it even 1 degrees, then it gets completely reflected what we call 100% reflected. Correct me if I’m wrong.
I'm a little unconvinced this number would be 90° in every pair of materials.
more like the critical angle would be when 50% of light get reflected.
@@mike1024. It's 90 degrees by definition. Critical angle is the angle at which you have to shine light into a material to get it to reflect at 90 degrees, if it doesn't do that then we don't call it a critical angle, simple as that. In case you misunderstood, they aren't saying that the critical angle itself has to be 90 degrees, that one varies from material to material, 90 is the exit angle by which it's defined
Never knew about this television stone - absolutely fascinating and mega cool! Thank you for sharing!
Bro took a sponsorship from worlds leading child labour supporters
Knowingly too.
1:30 I was like "don't break it"!
Is it a dangerous cristal (maybe because of the cristaline fibers) like asbestos is?
Apparently not. Geologists under other comments said the difference is these crystals are water soluble and made up of minerals absorbed and utilized by the body (the excess being filtered out by the kidneys), whereas asbestos never breaks down and leaves the lungs, causing damage for the entirety of a person's life after exposure.
I’m gonna call it reality fragment as it’s basically a piece of reality that was shattered and can be placed on anywhere in space to merge onto such existential object
I have a few pieces of this. Bought some from a shop about 5 years ago. Very cool
I noticed something about a month ago that I wanted to tell you about. The vent below my dash has a white circle with a white X inside of it. When I saw the reflection of this in the window of my door that was half way open the white circle had a white + inside of it. Some how the curve of the window is just right to rotate the reflection 45 degrees.
6:08 Temu also say you have to buy at least £10.00 of stuff, because of delivery costs, and is Paid for by the USA I hear
Just google TV Rock I got mine from Crystalline Earth Shop and I love it
In my 13 years working in an optical shop, we never called the angle at which total internal reflection occurs the "critcal angle". We called it the Brewster's Angle, and it is specific to any two adjacent optical media. For super nerds, the angle is equal to arctan(n2/n1), where n2 and n1 are the Indices of Refraction of the outside media and inside media.
"This stone is so incredible." [smashes it]
I think angling the camera would have been a great way to show how the light was coming from the *top* of the stone.
If you aren't looking directly from the top then it is blurry, so you can't look at it from the side. It is more noticeable that it is on top in person because we can see stereoscopically but we can't do that on camera.
@@TheActionLab that makes a lot of sense, my bad!
Someone else made a comment basically wondering if something could be hidden when the rock is sideways, which I agree might, or just blur the object, depending how thick the rock is, and how dark the object is behind it.
@@TheActionLab You still could have used narrow depth of field to demonstrate better what it's like in person, right? The video could go back and forth between focusing on the background and on the image on the top of the ulexite stone. In fact narrow depth of field is kind of like stereoscopic vision, in that it shows an integrated view of multiple angles of light (especially when used for phase-detection autofocus). And regardless of it not looking good from the side, I still wish you had shown this in the video, to further give a better idea of what it's like to see this in person.
Never seen one of those before. Very cool !!
One of the most interestinf episodes! I wonder if this rock has any use appart for doing experiments with it. It's amazing how the Earth can form such perfect rock!
Really like these videos when you break down complex ideas with something I never knew existed
this guy taught me about light in detail and with examples within 2 minutes, but my school takes about 1 month at least to teach this
So in a random galaxy, in a random planet there could be this stone scattered throughout the planet so those aliens could spy on other countries with this stone...
Wanna go even crazier? What's stopping that random galaxy from having a planet or a satellite made entirely from it? Just a clear sphere ether somehow inhabited or just the most useless moon for an eclipse.
@@skywarp1216 Elemental abundance is stopping it. In fusion reactions, boron is consumed more easily than it is made, so its steady state in stars is extremely small (it is one of those elements made primarily by cosmic ray spallation). So any planet is going to have overwhelmingly large amounts of other stuff in it.
Not dense or strong enough for that. Even in a planet without tectonic plate movement, the ground always shifts and settles which would break any natural fibre optic cabling longer than a meter or two over thousands and millions of years. So until you break off pieces of the rock layer and realize it's made of optical fibre, you'd just see white rocks.
This looks like a material you would *not* want to inhale.
I have one of these inside my computer case- I got it at the top of Pike's Peak, it's really neat- it doesn't magnify, it projects what's on the bottom to the top.
The slinky thing is such a smart and clever example!
Bro, please don't promote this BS site. It's the epitome of cheap consumerism culture. Please don't promote it.
That stone looks more like satin spar selenite to me. Both selenite and ulexite are very similar with all properties mentioned in this video, but selenite is more common, cheaper, and often whiter than the yellowish ulexite.
I'm sorry everyone's hating on your sponsorship. I understand as a content creator you've gotta hustle to make livable wages. Keep making that educational and high quality content friend.
Nice demonstration of optics!
I've actually been thinking about this material for a while now 🤔‼ I wonder if we could make an "orthographic camera lens" out of it. It wouldn't be a lens in the traditional sense since it doesn't focus any light, but given it's optical properties it would still filter out light by its incoming angle - the angle in question being a precise 90°, ideally speaking, making the resulting image perfectly orthographic. Randomly incoming light hitting a light sensitive screen would usually produce no image at all or a very blurry one, depending on the exact setup, but by using this "lens"/ filter, we effectively eliminate blur, which means we should be able to produce sharp images. The image would obviously be restricted and limited by the image sensor shape and size, and the exposure time would likewise vary wildly depending on the type of image sensor and its sensitivity, but I imagine some sort of polaroid-like film would be sufficient to make this a fun experiment. I'm not sure if there are any practical use cases for such a lens, especially given its sensor limitations, but I think something like this could have potential in microscopy, where (I'd assume) the electronic image sensors are as small as phone cameras' anyway, small scale telescopes for astrophotography, other fields in which small image sensors are used or maybe even laser technology
@der_noa If you look at a girl through this rock you can see her underwear.
@@rongarza9488rumor has it if you look at a glass through this rock you can even see the water inside it 😱🤯‼️
This idea is about 450 million years old. Trilobites (marine animals with nothing similar alive today) had some very sophisticated eyes, including some really fancy mineral optics. Read up Euan Clarkson's work from Edinburgh University. Fascinating eyes. But they still went extinct. Slowly. Nobody knows why. And one of their predators was in the habit of attacking form the right-hand side - which is also really weird.
@@a.karley4672 450 million years? Damn, there goes my chance to patent this idea. Thank you for reminding me though, I totally forgot about Trilobites' eyes for a second. Fascinating little critters
I wonder if you could make one out of stacking a bunch of super thin fiber optic cables together? Less optical defects..
your analogies are fantastic, it makes the subject matter attainable
The slinky demonstration was brilliant! Action lab and Steve Mould are great at intuitive analogous demonstration
Aristocrat slot machines use this tech on their button panels. A 1" piece of what looks like glass that sits on a small lcd screen. This magnifies the image and also makes the image appear on top of the piece of 'glass' just like the stone in the video.
Oooh nice
Damn... Soul sold... -.-
That's crazy, was about to post the same thing. Thumbs up.
I had a tie tack and finger ring made out of polished fiber optic cable. It was pretty cool to look through.
This is one of your better efforts. Fascinating, and previously unknown.
the real fiber optic cable core
for real
This is soo neat. Your channel is always so Informative and fun! 👍
I had a chunk about that same size, as a kid. I have no memory of where I got it, but I loved that thing
This is really cool, would there be any way to make it work if it wasn't directly touching the surface? Like a sort of orthographic camera?
you would have to focus the image right onto the surface of the material with a lense, i always thought this stuff was cool but i wish action lab had rotated the camera around the sample to give a better idea of the effect.
So this is how cavemans watched the football matches... I see!
Aaaah, I hoped you would get a fiber optic block, which shows the same property - it's a ~1 inch cylinder filled with straight FOs that makes perfect reproduction of what's under.
Oh man this has a lot of potential for cool decorations
I feel smarter after each of your videos man... Thanks bro keep it up
Always exposed cool stuff on this channel, actually I am in the process of starting a business that was inspired by your videos on refractive indexes. Specifically the video where you drilled a hole in clear ice, put some water in it and put your finger in it to make it look like your finger was frozen solid.
@3:15 You don't really need the laser, you can see the light passing through it to your camera only at certain angles, and you can see surfaces mirroring. The laser is a nice additional touch, though.
Wow, this is amazing! I did not know that kind of stone existed.
Sorry but temu's labor practices are questionable.
Television stone works when you hit it against a flat surface. All the spirits in the cemetery will be enticed to come along.
I didn't believe you at first, I thought this was going to be a debunk of a viral subject. Really cool. I want one!
I assumed this stuff was rare and expensive, but I'm holding a big block of it in my hands right now because it was so cheap! Thanks for showing me this, I'm having lots of fun with it!
Wow, the video description is literally just about the advertiser, would be nice to at least mention what the video is about.
Nah, this man is selling his soul to the CCP. It’s time to find a new science channel.
"it's as though it's a tv screen, but really it's a bright green stone that i'm putting an overlay on. This April Fools joke is sponsored by..."
With the cube of glass, you can see light coming in the sides and shadow, this confirms to me what's happening with that rock, as it has no such light coming in the sides..
I wonder if you could make something similar with glass or plastic fibers without too much expense. I saw a square ring with ulexite and it was really cute what they did in the design.
I was about to give this video a like, but then you had a Temu advert. I cannot support their questionable business practices. I am frankly appalled a science channel I respect like you, would take a sponsorship from any of these companies.
If it works, it works
@@killernyancat8193 They are using slave labor, you are literally condoning slavery my brother in christ
Why are you taking money from scams ?
1:09 I thought that was a giant screen you were calling your phone but after watching a few times I realized you just covered it with a fabric lol
I can understand now why during ancient time people would think some stones have magical properties.
Dude that slinky was such a great visual example. Thanks for making great, entertaining and educating videos! God bless.
I‘m sorry but he’s lost me at that sponsorship. Thought he’s better than that
Agreed, though at some point bills need paid
He don't do shit for free. Would you put in all this effort for zero? No way, illegal Jose. Gotta buy, produce, pay staff etc.
Oh man, I love that stuff. The only optical phenomenon that tingles my brain more is looking through a ruby laser rod. Try it!
I had one as a kid, loved that thing 👍
fun fact: it’s physically impossible to move without relying on other matter or without losing mass
Nope. You could emit light in only one direction, which in a vacuum would move you without relying on other matter or losing mass. Light has inertia but no mass and whatever I use to power the laser will lose energy but not mass. Your assertion only works if you count the mass-energy equivalence, but that's not really in the spirit of the "fun fact."
@@filonin2 depending on how much mass the object has the amount of energy used to overcome its inertia could be enough to lose some level of mass although a very small amount, just a few atoms still contains a ton of energy (also technically any reaction does in fact convert mass into energy although much smaller than .0000000001%)
Does emitting light cast off mass? Why do you say it would lose mass?
@@Ducky69247 using mass for energy to emit light
@@delusionalmerg1323 as in a chemical/matter reaction? So is all light chemically created?
This video sponsored by the CCP!
One of the coolest things I've ever seen in my entire life, and we named it the "television stone" great job guys
Those crystal fibers wouldn't float around in the air like asbestos does because they are heavier also if you were to breath it in you mostlikely would not be able to breath in enough before you had some reaction to it like coughing up gunk or your throat hurting. Like with asbestos it takes time and consistent exposure to get to the point of it hurting you not just one inhale. Also why don't we make a lense out of it for projectors. It would make a projection more clear by lining up the light going through it.
Your choice of sponsors is appalling lately.
with every ad this channel looses some of its value...
Wrong. The money he spends to create a video without ads to supplement it is a bigger loss. Please respect the importance of ads and sponsorships to supporting a sustainable income source and channel.
I just wish he could get sponsored by less shady companies :/
@@westonding8953nope. The worse the sponsors are, the more subscribers he loses.
@@Ducky69247that seems contrary to his gradually growing numbers. Although I do dislike shady sponsors, I am considerate to what KZheadrs must deal with and choose at times.
So you can make a lampshade/screen for a lamp and turn the lamp into a ring light! That's definitely how ring lights work!
Thanks for helping me study for my Optical Mineralogy class :)
He got himself tied into knots over crystallographic and optical axes. Even the most triaxial (crystallographic) of minerals is still biaxial (optically). Don't make that error yourself - it caused much confusion for several of my class mates (not helped by having optical mineralogy and crystallography theory lectures on the same morning separated by a 15 minute tea break).
Can I get a hoooyaaaah
Nope.
Hoooyaaaah
@@dr.chungusphd108 :' (
nuh uh
Temo is trash and doesn't value there workers forced labor literally sponsoring the same think everyone else is so annoying 😮💨
I have never heard of that stone before, but suddenly I need some lol!
Okay the slink demo is so awesome!