Invisibility: The Science of How Not To Be Seen with Neil deGrasse Tyson & Greg Gbur

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Can you make something invisible? Neil deGrasse Tyson and comedian Negin Farsad discover the science behind invisibility with professor of physics and optical science, Greg Gbur. What would real-life invisibility look like?
Can you be invisible in other parts of the magnetic spectrum? We discuss transparency versus invisibility and how metamaterials help us interact with different wavelengths. What does light have to do in order to make something invisible? We break down invisibility cloaks and other invisibility devices from fiction.
Could you make yourself invisible to all parts of the electromagnetic spectrum? We explore the main challenges in achieving invisibility and the difference between passive and active invisibility. How useful of a power would it be?
We discuss the interaction between waves and matter. What makes some waves reflect off matter and others pass through? Learn about x rays and how they work, plus, an at-home invisibility trick using prisms. Finally, could you make someone invisible to time?
Thanks to our PatronsDan, Nick Taylor, Beth Fitzpatrick, Jim, Laura Gilsman, and Gregory Greenwood for supporting us this week.
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Science meets pop culture on StarTalk! Astrophysicist & Hayden Planetarium director Neil deGrasse Tyson, his comic co-hosts, guest celebrities & scientists discuss astronomy, physics, and everything else about life in the universe. Keep Looking Up!
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00:00 - Intro to Invisibility
4:04 - Can you be invisible in other parts of the electromagnetic spectrum?
09:00 - Altering the path of light
15:02 - If a device uses energy wouldn't that come up in infrared?
18:20 - How could you make something invisible to all parts of the spectrum?
23:58 - Would someone who is invisible be able to see?
28:40 - Active vs. Passive Invisibility
35:32 - The interaction between waves and matter
44:17 - Is it possible to make someone invisible to time?

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27 апр 2023

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Комментарии : 412

@StarTalk Год назад

Want to learn more about the science and history invisibility? Check out Dr. Greg Gbur's book! amzn.to/3AJEo2y

@genericusername5909 Год назад

Regarding the black/white question; illuminating things with sodium lamps will remove color information, save for the orangey sodium lamp color

@NuntiusLegis 2 месяца назад

I once heard a strange, somewhat aggressive noise, like a warning, in a small forrest of young trees besides a new, yet empty business area (streets, but no buildings yet, I had slipped under a barrier to investigate it). But I felt more curious than warned, so I picked up a stick and hurled it into that direction. Seconds later the noise appeaerd again, directly in front of me, right into my face. I froze in terror, was sure to get killed at any instant, then fled as I never fled in my life. Nothing could be seen.

@ahinsaGaming Год назад

After 15 min in the video I realized i need a refresher on waves.. i am glad i did that , Always a pleasure to watch startalks

@TroyNaumu808 Год назад

Everytime I listen to Mr. Tyson my mind is literaly blown and enlightened.

@i_smoke_ghosts Год назад

right on !

@mykeljmoney Год назад

RIP your mind

@fuckthisbs Год назад

Maybe not quite "literally" 😂

@Sammasambuddha Год назад

Put some plastic down.... ...works for lotsa stuff!

@FrozenLabRat Год назад

kind of but not when he talks about things he shouldn't, like vegetarianism and consciousness.

@jmanj3917 Год назад

23:40 Yes, Doc, the B-2 is engineered to greatly reduce its heat signature as well as to present a miniscule radar cross section. The engineering behind this aspect of the B-2's stealthiness is really quite brilliant. And it's so conceptually simple that you might wonder why it isn't commonplace in the industry. The exhaust is re-burned (for lack of a better term), and then it is actively cooled before it exits the plane. Then, when the exhaust is finally ejected from the rear of the plane, it is spread across a wide area (so as to make it a planar ejection area) rather than through a singular, (point-like) nozzle. And, as you know, the larger the area through which the exhaust is passing, the less dense will be the energy emitted. This makes it harder to detect as well. So, the combined effect of these steps is that it is very difficult for a heat seeking (infrared) seeker head on a missile - the missile's "eye" - to track it. The same applies to the radar systems that are supposed to identify, lock onto, and track the aircraft as part of an air defense network. The cooled, pre-thinned exhaust just doesn't present itself as a viable target. So, although it does still emit a good deal of heat, it is not something that can be effectively engaged via IR/heat based weapons systems. Add to that the radar absorption and dispersion, and you have a bird which has been known to frustrate the heck out of its enemies. 'MURICA!! 😀

@27Afroman27 Год назад

Doubt I’ll get an answer but if anyone can answer me this is a black hole not technically invisible?

@jeffosborne5131 Год назад

cost.

@2hockeystixneil Год назад

YESSSSS NEW EPISODEE!!!!!!!!!!! Im 21 from Dallas. Love this podcast and watch it every night at work. Im an overnight stocker. Much love and support

@StarTalk Год назад

Hope we make the shift a little more entertaining :)

@top40gordy Год назад

Love the show! Every variation of Star Trek has had at least a few episodes dealing with cloaking devices. In The Expanse, Mars had developed a fictitious stealth paint that the bad guys use to attack Earth by fooling the asteroid protection grid. The asteroids were essentially camouflaged by the paint. The Romulans needed power for their cloak, so they couldn't use their weapon without decloaking. In Star Trek VI, Uhura's idea about the tailpipe allows them to successfully target General Chang's cloaked Klingon warship.

Год назад

The first things that I've thought when this video was recomended to me was two animals: the chameleon and the octopus. Both deals only with the visible wavelength, but both were "naturally adapted" themselves to try to be invisible against any other threat/prey. The octopus goes even beyond, because it changes the skin not only about the color, but also the shape. Alright, it's not true invisibility, it's mimetics (sorry for my english. Not my native language, that is portuguese. I'm from Brazil). But the way both animals do it, appear to be very effective, and the only main "sensors" they use are tiny eyes. I'm pretty sure that both use not that much energy to perform the trick. Loved this episode. Thanks a lot for inspiring us to use our brains and get us out of our "confort zone"! ❤️🤗

@supaslime2938 Год назад

Yeah I thought the same. The octopus and also the cuttlefish are masters at this. I believe the cuttlefish can also change the texture of their skin also to match their surroundings. It is very cool to watch

@user-tc1fw5ms5s Год назад

I was thinking of the octopus too！ Also, your English is better than most Americans lol

Год назад

@@user-tc1fw5ms5s thanks a lot!!!

@frankwestphal8532 Год назад

Yeah this is a great example of active manipulation vs passive. I can see why Greg said that the word "invisibility" is high subjective. Things can be invisible or somewhat invisibile for many different reasons.

@Marco.Polo.Fisher 10 месяцев назад

Consider other animals and insects as well whose coloring and form is perfectly suited for them to blend into their environments. Tigers, leaf bugs, walking sticks and etc...

@dunderwood4444 Год назад

Or you could be Blessed with 2 Narcissistic parents and become the invisible child, That was my life

@treybaybie1526 Год назад

So sadly true ! 😕💐

@jeffreysherman8224 Год назад

OUCH! 😨 Sadness... 😭

@makayladorvil1542 Год назад

❤

@sunflowerglitter9233 Год назад

Facts! Especially when they’re both narcissists.

@kencochrane2885 Год назад

Sounds like you had it good. I would explain why but the content of my childhood in contrast is too dark for this thread.

@danielludlow8960 9 месяцев назад

I agree with Neil Degrasse Tyson.. I'm 55 and what refreshes life for me is learning more things. I may not know everything but I know a helluva a lot more than I did a year ago. I love this about life in America. The freedom to learn more.

@i_smoke_ghosts Год назад

thank you people for allowing a sit in on a fascinating subject the discussion of which is usually done (in my experience) by comic collecting boys or 'just smoked a blunt' stoners ... both groups i respect however hearing it'from the horses' mouth ' is a golden opportunity. thank you all 🙏🏽

@Sammasambuddha Год назад

Some of us require *blunt* force learning! Heh..heh...heheheheh.

@hotrodpawns Год назад

This discussion opens up so many questions to ponder, like for example, since humans live in a 3 dimensional world, how do we know or not know, if there are beings in the 4th and up dimensional world/s, that are invisible to us, but we are not invisible to them, because they can see from their dimension down to the 1st dimension, but we as humans can't see past our own dimension. These are the kinds of questions i ponder.

@Sammasambuddha Год назад

Sounds^ more like answers. 👍

@cicad2007 Год назад

What I didn't hear mentioned is that I have seen windows that turn from transparent to dark with the touch of a button by rearrangeing the micro-crystals on the glass coating.

@remischmitt9308 Год назад

Nice discussion. the oldest mentioning of Invisibility i know of is in the story of Siegfried in 'die Nibelungen'. He uses something called "tarnkappe" he got from the King of he Dwarves to become invisible. the literal translation of tarnkappe is hat-that-cloaks. Of course it works by magic and not technology.

@damienganesh8234 Год назад

Lovely Juberly

@TheRealSkeletor Год назад

"Any sufficiently advanced technology is indistinguishable from magic." - or - All magic is just technology we haven't discovered yet.

@HaggenKennedy Год назад

Das Nibelunglied is only from the 1200s. The first instance of an invisibility device we have is Plato's "Ring of Gyges," an obvious source of inspiration for Tolkien.

@rogertulk8607 Год назад

I achieve invisibility from time to time when I am at a party with certain members of my family and nobody looks at me or talks to me. It's easy!

@michaelccopelandsr7120 Год назад

Neil and Chuck for 2024

@beargillium2369 Год назад

They're both far too intelligent to be politicians

@edwardcalvet Год назад

They'll get my vote

@xBRVTALx Год назад

Have you heard Tyson’s thoughts on COVID? He’s an authoritarian.

@beargillium2369 Год назад

@@xBRVTALx uh can't say I have, care to provide a link?

@dsnitely Год назад

Did Tyson chicken get Covid? Mmmm chicken

@TheFlameGarden Год назад

however after invisible light spectrum the wavelengths are so small the yes you would need a lot of layers but they would be extremely small so that material though layered would still be relatively light and manageable i assume

@youngblack253 Год назад

I wonder if Vanta material could be made into a mirror. Vanta has an all absorbing characteristic and obviously a mirror has reflective properties. Can the two coexist?

@TheAnonJohn Год назад

The other time I got in a bakery, there were 3 employees available and noone offered to service me. I am already invisible!

@Sammasambuddha Год назад

"Bakery" riiight....

@filipmilovanovic8942 Год назад

Black and white room: probably not fully possible because of light bouncing around, but, take a projector and beam out a picture of the room with colors modified in just the right way. P.S. Had to note Greg's passive-aggressive taunt of Neil via the Pluto model in the background :)

@Nefville Год назад

Can't say I saw this topic coming but I'll see where it goes. Or not.

@susiesuh1418 Год назад

I confess, I don’t watch star talk unless Chuck Nice is cohost. If Dr Charles Liu is on then I watch it repeatedly.

@chefRyan38 Год назад

I'm 38, single, no kids, no career, no reason to exist. Yes, people can become completely invisible it just really sucks.

@blessedveteran Год назад

What I heard here is you are free without any strings or drama.... perspective is key in life 👍

@Sammasambuddha Год назад

Are you...BATMAN?!

@chefRyan38 Год назад

@@blessedveteran the grass is always greener

@chefRyan38 Год назад

@@Sammasambuddha na... I'm Catman

@danmarius Год назад

When you are talking about the light going around the object and having a speed greater then the speed of light in vacuum I am thinking about the Predator camouflage.

@TorQueMoD Год назад

I have to say that Negin is a great alternative to Chuck. I hope we haven't seen that last of him, but it's also cool for him to have a stand in every once in a while :)

@anulis2010 Год назад

What happened to Chuck??? I love Neil but I cannot watch these without Chuck anymore 🤣

@bradleyroissetter6796 Год назад

I havnt seen chuck in a while, anyone know if he's coming back soon ?

@robertplant9710 Год назад

Yeah i miss him

@pejko89 Год назад

He's in there, just trying out the new invisibility cloak

@abdirahmanhussein5214 Год назад

Have been thinking about this yesterday, How i could become invisible. Thanks for the enlightenment.

@Sammasambuddha Год назад

Turn off the lights.

@DanielSatterwhite-g2b Год назад

Love physics. So much possibilities. Only enough to experience some. What a joy.

@dontactlikeUdonkno Год назад

Wouldn't only the material be invisible? Like you're holding up a transparent cloak in front of you. Love the content

@TorQueMoD Год назад

I suppose it would depend on how the cloak works. If it bends light around itself, then anything on the inside would also become invisible. Same reason why we can't see through buildings etc.

@ClintonFerrara Год назад

The elvin cloaks in lord of the rings have always fascinated me. I’m a photographer so I think 50% gray makes things invisible.

@baadbeats Год назад

Where’s chuck

@smoothaswater Год назад

Solution 1 for black and white room So making a black and white room is possible. I have done it on a stage before with dancers/actors. This is how I did it. There is a backdrop we call a Cyclorama. This is typically as pure white as we can get. Being white the cyclorama will reflect many colors. There are two main types of light on a stage. Downlighting (light that is shining from the front to the back of the stage) and backlighting (light that shines from the back to the front of the stage). If I shine a weaker down light and a much stronger backlight of the same color. What will happen is the backlight will over power the downlight which will make you only see the object as black. We normally do this with a setting of about 10% downlight and 100% backlight. The 10% down light is there to make the object have cleaner lines. Because if there is too much backlight and no downlight the backlight will bend around the object and make it appear fuzzy.

@jeffosborne5131 Год назад

Have worked on this idea for decades. The answer is to have mini lens/transmitter [l/t] devices woven into material (stiff or flex) and co-ordinate via cpu, equal and opposite alignment by internal navigation, the operation of the l/t opposing. The devices resemble tiny fish scales or sequins. Thus whatever light is sensed and sent 180 degs. with little delay or distortion. Any and all thoughts welcomed.

@jeffosborne5131 Год назад

Another is electro stimulate paint/ dye to mimic and obscure, as the cuttlefish does so wonderfully.

@murderedcarrot9684 Год назад

After learning the beauty of isolation. Meditating and the principles of bland, and mastered the techniques of the boring you will achieve the holy state of invisible.

@rjtablet Год назад

Adaptive camouflage, like how the octopus does it would be extremely close to invisibility.

@DannyJoh Год назад

If you make Schrödingers cat invisible, does that mean it's impossible to collapse the wave-function? I mean, it's not observable 🤷‍♂️

@RASTA_20CM Год назад

The way he puts me to sleep is the most, and l do listen to everything he says and try to imagine and to understand....best way to fall asleep everyone 👌

@DexLuther Год назад

The visible light cloak is already kind of a reality, and the prism effect isn't that much of a problem as long as the object isn't moving. The prism effect comes from the fact that light hitting the edge of the object is less curved or not curved at all compared to the light hitting the center and having to be bent around the object, which causes a delay. To deal with the delay in light bending around the object and the prism effect, I think you could apply the inverse delay to all the light. The light going through the center of the object would be delayed more than light hitting the edge of the object, so you add more delay to the light hitting that edge to make all the light hitting the object project at the same time. You'd get rid of the prim effect and be looking at a flat image. It's basically like the clocking device the Predator has. As long as they aren't moving they are invisible. Your eyes don't know (or care) that the light it's receiving is technically delayed a couple fractions of a second. To your eyes, it just looks like normal light coming in a straight line like it normally would. The prism effect comes in when the cloaked Predator is moving too fast, which throws off all the light curb and delay calculations your material or system would have to do. The same principle applies in the show Stargate Atlantis, which Dr. Tyson had a cameo in, when they turn the city's shield into a cloak. The city doesn't move, so it's not impossible to delay the light hitting the edge of the city as long as the light that hits the center of it. That way all the light reaches the observer at the same time.

@aldomandovani Год назад

Fun fact the C4 corvette from the 1980s was designed in order to make it harder for police radars to see it by makeing the Radiator cross section smaller

@isatousarr7044 2 месяца назад

Invisibility, from a scientific perspective, involves manipulating light and other electromagnetic waves to make objects undetectable. Research in this field includes metamaterials that can bend light around an object, effectively rendering it invisible to certain wavelengths. Other approaches explore active camouflage, which uses sensors and projectors to blend an object with its background. How might future advancements in these technologies revolutionize applications in fields like military stealth, privacy, and materials science?

@KevinHallSurfing Год назад

There's an old fashioned, almost vintage, invisibility/cloaking device? Like used for the "Predator" movie maybe? And I thought it was just blue screen editing.

@Corvaire Год назад

Light inversion directly beamed at your iris could combat cloaking hurdles. ;O)-

@CW19941 Год назад

If only we could figure out a way to bend light around yourself like The Predator 🤔😂*Ourselves, not yourself.*

@crystalferrai Год назад

Regarding the question about turning things black and white with lighting, it is possible they were referencing how everything appears grayscale in low light. Human eyes need a certain level of light before they can perceive color, but can see contrast at a lower light level. Within the range between the two, things are generally perceived as grayscale, which people occasionally refer to as "black and white".

@r.m10234 Год назад

im invisible already 🔥

@animeshsrivastava2398 Год назад

I wonder why has Dr Michio Kaku never appeared on this show.

@jjbud3124 Год назад

Would this explain the object I saw a few years ago that was a featureless gray round flat object against a blue sky? it was travelling and at the time I thought "cloaking?" It almost appeared to be part of the sky except for the lack of color. Just before it went out of sight, it reflected sunlight. This was about 5 years ago. What do you think? I think we/or somebody already has cloaking.

@andrewcrookston6663 Год назад

Where’s Chuck??? He invisibly attending? 🤔💭

@frankwestphal8532 Год назад

This was a good one. I thought Greg had good insight on the ideas/[practices of specifically structured material manipulating light.

@67kemo Год назад

There aren't a ton of subjects in this channel I'm interested in, but the ones I do watch are always both entertaining and enlightening. Yeah, I'm a Tysonite! Sue me!!

@smoothaswater Год назад

Solution 2 for a black and white room. Is to phase shift the light shining on objects. How this works is. You must be wearing glasses that only let in one phase of light. If an object is designed to phase shift light that bounces off it to a phase which your glasses do not let the light through it will appear black. Everything else will appear normal. In this case with a black and white room just have everything white with normal vision in the room. Have some objects that phase shift the light bouncing off them. Put your glasses on and everything that is phased shifted becomes black every not phased shifted is still white.

@katanaridingremy Год назад

I think this idea works better when viewed less through the lens of being invisible and more in the lens of being camouflage. Like a scuttlefish or octopus changing is skin, texture, and pattern to match its environment. Obviously, it works best in the water, sky, or space opposed to land.

@anwaypradhan6591 Год назад

Well, to make an object invisible, that particular object should have to bend light around itself so that there remains no casting or shadows and no reflections can be formed. Only metamaterials can make it happen.

@WtfYouMeanDude Год назад

I tried the invisibility cloak at work, but apparently it didn't work because they found me sleeping in the broom closet and fired me ...

@rationaltrekker2509 Год назад

Being a Trekker, I can't help but think of cloaking devices in the Star Trek universe. It's not how they might work, but their limitations even in that fictional world that intrigues me in the context of this real world presentation, especially after the question about energy absorption leading to an object radiating in the infrared spectrum.. Several times we see Federation people detect a cloaked Klingon or Romulan vessel. In Deep Space Nine there is concern about whether the Jem Hadar will be able to see through the Defiant's cloak if they are at warp. Would it ever be possible to be cloaked against all areas of the electromagnetic spectrum, even if you could be in certain ranges?

@Danymok Год назад

I have already achieved this

@dijanagugicbokun3833 Год назад

It would have been cool if the guest professor just left an empty chair to be in the web cam shot and talk to them during the entire conversation off camera…. Nonetheless….super fun interview! Thanks AGAIN

@JCtheMusicMan_ Год назад

Invisibility depends on the OBSERVER and its capabilities. My thoughts are invisible to a person but are visible to a brain imaging device. A physical object’s level of invisibility is directly proportional to the observer’s capabilities to detect. To answer the question of invisibility, one must first define the conditions in which invisibility one wishes to achieve.

@jeffs6090 Год назад

Which is exactly what they said throughout this video.

@SirNecro Год назад

On the old CRT style televisions you could take all of the colours out of the picture by adjusting the gamma saturation. Perhaps this answers that question?

@Palidine4M0O Год назад

If you have an active system that reads the incoming light and then generates that light in the direction on its other side, then you can span/sniff that info and still SEE using that information, so in an active invis cloak, you're fine. And with some passive, you could have an energy source that buffers and increases the light on its way out to the other side, but shears some of it off in order to SEE.

@T3aR3Drop Год назад

PoP quiz, are fan's of Refraction also waves? Does it bend time? So gravitational lensing? What possible materials could it be made of?

@oo7sk8punk 2 месяца назад

being unseen is often as simple as just being seen as something else, augmenting perception is easier than erasing it entirely...if you think about it, seeing 'nothing' would be odd, especially if that nothing tries to interact with the environment.

@Sammasambuddha 17 дней назад

Like...a stealthy ninja! Or a liquid metal Terminator.

@27Afroman27 Год назад

Doubt I’ll get an answer but if anyone can answer me this is a black hole not technically invisible?

@genauso_ravi Год назад

If you light up the room with a light flickering at more than flicker fusion of eyes, one color at a time everything would look colorless 🎉

@JMoroccoMisterBoy Год назад

Ms.Negin Farsad, Messrs. Greg Gbur & Neil deGrasse Tyson : Tks. much appreciated.

@anwaypradhan6591 Год назад

Well, there are many positive aspects of infra red radiations. Some of the Household appliances such as heat lamps and toasters use IR radiation to transmit heat, as do industrial heaters such as those used for drying and curing materials. A common example of an infrared (Ir) device is a TV remote. However, infrared is also used with computers and devices like a cordless keyboard, cordless mouse, and infrared touch screen. Most computer wireless devices (e.g., wireless keyboard and mice) used with computers today are using Bluetooth and not infrared.

@ArtSurvivesArtist Год назад

When they were talking about invisibility in a room, Chuck chimes in, "You guys, you're referring to a light switch. Come on!"

@lydiafaye494 Год назад

With the seeing in black and white, with the way rods and cones work in our eyes (rods being our night time vision and lack the ability to mediate colour), wouldn't just turning off the lights/excessively dimming light cause everything to be seen in black and white? Kind of like going for a nature walk at night during a crescent moon, or how aurora from low level geostorms are seen as white or very low colour saturated lights

@subtleblows Год назад

"and therefore..." love it

@janewayofchaos3255 Год назад

This makes me wonder, if there is intelligent life out there, is it not possible that they found a way to remain invisible to the tools we currently use in our search?

@adamboise3907 Год назад

I doubt they need to, or tools still aren't that good to find life like our own, but they are getting better.

@67kemo Год назад

I'm still on the fence about the existence of aliens, but I'm 100% certain that if they do exist, any time WE spot them is the result of an error or miscalculation on their part. It's inconceivable to me that a civilization advanced enough to travel here in the first place, would not have the ability to keep themselves completely hidden from, in their eyes, the primitives. It's almost as bad as the arrogance of believing we're the only intelligent beings in the cosmos. A nearly uncountable number of planets, and you're gonna try and convince me the universe only ever got lucky ONCE! Got a great deal I'd like to offer you on a bridge; bargain basement prices!

@dsnitely Год назад

Or they can live in another dimension or level of subspace, and so they're invisible to us but we can be seen by them

@67kemo Год назад

@@dsnitely Great point!

@HaggenKennedy Год назад

Everyone nowadays: Cloak of invisibility = Harry Potter Me: Poor Sheila. Completely forgotten.

@robnol84 Год назад

There’s a thing similar to the prisms he was talking about that uses a large fresnel lens to bend light around something.

@LibraTransitioned Год назад

Love this topic.

@KiingDa3rd Год назад

I've started feening for startalk. I look for new episodes daily

@AyushSingh2B Год назад

Just Stand INCREDIBLY still !!

@tamtamtt63 Год назад

I'm not a scientist or physicist and know very little about it, but I've been able to achieve invisibility without even trying. Can we have Chuck and talk about stars back please?

@XennialGuy Год назад

I knew a guy whose company produced that paint that was used on stealth bombers. They were trying to get it to be used on solar panels, because it had a very similar effect of allowing the solar panel to absorb more of the solar energy. But the US defense department would not allow that use under the contract.

@diablosmda324 Год назад

You want to be invisible ride a motorcycle in traffic. Examples from Science Fiction that immediately jump to mind is Star Trek and Predator. And when asking how long the concept of an Invisibility Cloke has been around it’s obviously been around as long as Gene Roddenberry wrote Star Trek. In the Predator movie it’s cloak was not perfect (you could see it), and you could also see it’s eyes. In the second movie the Predator shifted from one band of light to another. But in both cases (Predator and Star Trek) the cloak was “active”; could be turned both on and off. I imagine a material that was “invisible” on one side but invisible on another it would achieve a kind of active cloak.

@zero11010 Год назад

As more and more vision becomes digital in nature this may open up new avenues for invisibility. If the US builds a camera system it may be beneficial for the US to have the ability to put people in specific clothing or vehicles in specific paint that trigger the software to remove that thing from the recording.

@DiegoT Год назад

Where's Chuck?

@matbasterson2128 Год назад

In my experience the easiest way to become invisible is to ride a motorcycle or bicycle. No one in a steel box with wheels will see you.

@joeandjoe2 8 месяцев назад

Butterfly's wings have colour because of the structure of the wing rather than a property of the materials. If you touch the wings you can break the surface structures and disturb the light affecting effects causing the wing to appear more brown.

@dresmat72 2 месяца назад

Neil: Professor Gbur, long time no see you. Professor Gbur: Exactly.

@yesyes_uk Год назад

About the black and white room, you could illuminate it dimly enough so that our colour receptors in our eyes don't activate.

@ospididious Год назад

Sometimes, I swear I turn invisible. I'll be standing right in front of someone, they'll look right at me, then they remark that I just appeared out of nowhere, even though I had been standing there for X amount of time. Then again, I have also experienced temporal and gravitational fluctuations. Not at the same time, but all of the above on multiple occasions. I need to talk to a physicist about my life...

@coconutninja351 Год назад

I know this is going to sound crazy but when I was 18 I was laying down looking up at the night sky & a ufo flew over me I saw it for about 4 seconds . It had 4 lights underneath around the craft & a big circular light in the center they were the color of sunlight . Flew over about 4 story’s high , It was disc shaped & all of the sudden it went invisible! ! It didn’t blink out of existence it started from one end of the ship to the other . I will never forget that night.

@psigh8161 2 месяца назад

I'm aware it wouldn't work in real life, but suddenly it feels so odd to me that nobody in sci-fi (afaik) has theorized an invisibility device based on quantum entanglement. In real life entanglement is very different than it is in fiction, it cannot transmit information and it is only apparent if both results are already known, plus the entanglement breaks as soon as a measurement is taken, which also means no light can ever touch either of the entangled particles before the observation is conducted (there are videos, i believe on this channel as well, explaining this in an actually understandable way) BUT, in sci-fi entanglement is magic, it allows two particles to react to one another, sending data through one allows you to communicate with the other instantly So, a good sci-fi idea could be that particles on opposite sides of the cloak are entangled with one another and made of a reflective material, light reaching one particle is instantly ejected out the opposite side from the entangled particle, creating the illusion that nothing is there to block it. This might incur in the opposite issue that was described, in the sense that in this case light is not going slower than it should but faster instead, so it might create a weird reverse lense effect

@jamesgreenler8225 Год назад

Very interesting conversation. Perhaps the best way to make something invisible is to surround an object with energy because the only thing smaller than a photon would be another particle of energy.

@jamesgreenler8225 Год назад

I've seen footage from the earthquake tsunami in Japan in 2012 that shows a water front and a hovering craft that goes from a hovering and moves into the water and disappeared. Before the craft moved you can see what looks like sections of it sequentially light up like turning on a fluorescent light.

@karimamin2 Месяц назад

I think you could apply some sort of crystalline structure to a suit which will reflect 98% of the light from opposite sides to the other giving something similar to what you see in the predator where you're not totally invisible but close enough. No power needed but you'd be blurry

@larscarter7406 Год назад

Smoke or electronic countermeasures would make complete invisibility?

@iammaxhundred Год назад

What if you had it so that the observer is looking at you through lenses and making you smaller (like looking backwards through binoculars)???

@Breeeeeeeeeze Год назад

Neil, if you had an actual studio with face to face interaction with different guests, discussing interesting topics about science and universe, you could actually become the next Joe Rogan in RU-vid. Just saying, it would have such a greater reach. Thanks for the content and all the best!

@silaskelly604 29 дней назад

What about the semitrailer trucks that have a video camera on the front capturing the road in front as you are driving and on the rear of the trailer is an led panel showing that video, effectively giving the drivers behind you a better vision of the road? I don't remember the author, but in the 1950's I believe a sci-fi author invented "slow glass". In the summer you take your window panes out into the forest and lean them against trees for the whole season. In the fall you bring them in and swap with your "winter panes" and all winter long, look out the windows at the pastoral scene instead of dismal winter snow, etc.

@OP-rp4hc Год назад

Hi Neil i am passionately attracted towards your documentry Please make a documentary on CORAL REEF BETWEEN SHRILANKA AND INDIA

@writerseye 20 дней назад

I worked as a painter when I first came home from the service. My boss could make himself invisible every Friday at pay time... I knew how to camouflage too so I knew how to find him.

@eugen-m Год назад

can we say, in extremis, that the event horizon around a black hole can be considered the ideal invisibility device?

@robertfinck1275 Год назад

Something else I pondered was Teslas Transparent Aluminium Glass. How long till the have invisible robots? Or whatever else besides their windshields.