What Is Light?

We are so used to some things that we stopped wondering about them. Like light. What is light? Some kind of wavy thing, right? Kind of.
Short bonus video for the people waiting for new stuff.
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What is light?
Help us caption & translate this video!
www.youtube.com...

[@kurzgesagt]

You want to learn more about science? Check out our sciency products on the kurzgesagt shop - all designed with love and produced with care. Getting something from the kurzgesagt shop is the best way to support us and to keep our videos free for everyone. ►► kgs.link/science (Worldwide Shipping Available)

[@rhettmurdoch7886]

Kurzgesagt - In a Nutshell wazzup

[@yoinkling]

wazzap

[@syedbilal6281]

Hello

[@Rainier214]

cool, thx

[@sanshds7174]

@@Rainier214 m

[@isaacbrown8907]

I'm going to have to watch that again, it went in one ear and out the other

[@maeen..]

Same here

[@purplesloth1928]

Honestly same

[@alicelima285]

fr

[@STaBC]

This video has 6 million plus views. I'm betting there are only 30 of us who have watched this... and we still don't get it. :)

[@kanishkasinghal3643]

Ya same here i am small to understand these things i am learning things so that i can understand

[@Nurr0]

Whenever I have a stable income I'm supporting this channel, seriously. Such high quality.

[@Slenderman63323]

Not much quantity unfortunately :( I wish Kurzgesagt could churn out 2 vids a week

[@toad7395]

Quality > Quantity its in the channel home

[@Slenderman63323]

Suki ???? yeah, but I'd sacrifice a little quality for an extra video every now and then yaknow? :P

[@cozzie1407]

I wouldn't

[@isnitjustkit]

Amen

[@Natalie-101]

At the end of videos like these, I always feel like I've learned a bunch of things and nothing at the same time

[@BillAnt]

Well, at least we saw a bunch of cute little birds just standing around.... in a nutshell. :D

[@ice-nw3ps]

Yes i feel like i cant explain what i learned properly

[@charcinogeneticist]

Light is electromagnetic radiation that can be detected by the human eye. Electromagnetic radiation occurs over an extremely wide range of wavelengths, from gamma rays with wavelengths less than about 1 × 10−11 metres to radio waves measured in metres.

[@NiTeLightYears]

Just take notes on important point

[@swarikabhosale7773]

Paradox of Learning 🙂🙃💁‍♀️

[@RainAngel111]

Learning any physics stuff always just brings up so many more questions

[@johnny5.56]

Yeah because relatively speaking we know almost nothing.

[@guydreamr]

Welcome to the infinite complexity of reality.

[@georgeadams5835]

It always makes me happy when they say, 'In a nutshell'.

[@ReusableRocket]

KZbin is so broken lol. This comment 4 days ago and only has 3 likes is the second comment I see in the comments section... so weird. (Not saying that your comment sucks, I actually liked it)

[@ding5296]

It's probably the second comment because the first is pinned by kurzgesagt

[@cowgamingyt8751]

Not an it a

[@anonymous.2660]

No

[@ELValenin]

@@ReusableRocket maybe the invisible comment dislikes get counted in the tree ranking.. Idk

[@makspieprzyca4032]

-Everyone is asking what is light, but nobody is asking how is light *Sad photons*

[@micropanda7916]

Idk why but because of you comment i am sad. Poor Photon :(

[@OverskilLFull]

photon wont even have any time to experience sadness

[@gocommitbreathe21oxygen11]

@@OverskilLFull r/woooosh

[@joshr5151]

Star lord: where is photon? iron man: who is photon? drax: why is photon?

[@AsheeshGupta1978]

I want to know Why is light.

[@kurzgesagt]

Uhm. We might have made a mistake in the last rendering. No Tardis in this video. Sorry. Might hide two in the next one.

[@Flame1500]

+In a Nutshell - Kurzgesagt haha I was looking for one and couldnt find it :D. Really interesting video, this is also what we are studying now at my school in physics so great timing! :D

[@WalidAmghar]

+In a Nutshell - Kurzgesagt Ahh :(

[@MCWaxMax]

+In a Nutshell - Kurzgesagt Let's just say, the time lord was busy and couldn't appear :D

[@anatelles3512]

umm... cr cr cr oops not again

[@computercrafted]

Can you post the video that was abandoned? It would be cool to watch it

[@purplehaze2358]

“Being kind of a particle and a wave at the same time...but this is a lie.” Same energy as “Well yes but actually no”.

[@arnaud7008]

The picture shown is wrong, but the idea is correct

[@charcinogeneticist]

Light is electromagnetic radiation that can be detected by the human eye. Electromagnetic radiation occurs over an extremely wide range of wavelengths, from gamma rays with wavelengths less than about 1 × 10−11 metres to radio waves measured in metres.

[@Platin_2004]

Can we rename flashlights to photoncanons? It sounds cooler and is technically correct...

[@funkyhat8176]

it's me YES

[@Jordan_Dossou]

Nah save that for the actual future photon cannons lol

[@tarnished6642]

if it were literal. People in clubs are massacred

[@RKEDITZ]

cool

[@Indoraptoad]

it's me or plasma beams!

[@Joe005]

That feeling when Kurzgesagt release a new video ❤️

[@avamander.]

+Jaymax, Seven minutes and this video already has 3k views and 388 likes.

[@TristanVeerbeek]

I know right? ❤️

[@justalex6953]

Awesome

[@bojarororo]

+Avamander / and 7 dislikes, just like all good videos

[@basik6825]

Yeee

[@HetiRozmar]

This is heavy... Light, I mean.

[@BreatheManually]

+WalruszMester Feeling lightheaded already?

[@internetexplorerpony]

Hey, I see what you did there.

[@jqerty]

+WalruszMester I C what u did there

[@ThatGuy-hc2ei]

+WalruszMester There's that word again. Heavy. Why are things so heavy in the future? Is there a problem with the Earth's gravitational pull?

[@ThatGuy-hc2ei]

Neo Mix That's a question I will never answer! It's to risky!

[@GeneralSpecSam]

If the universe is a simulation, the speed of light could be the rendering speed of the universe

[@johnad101]

@awesomo9 Nah, black holes are the system's recycle bin

[@jonpaul3868]

Light is actually the frame per second of our simulation game😂

[@johnad101]

@@jonpaul3868 And atoms are simply the pixels with which the universe is rendered

[@oammaslastnamethei3063]

@awesomo9 black holes are the farming simulator 2021 of our universe

[@erezsolomon3838]

2020 edition was the pandemic system being checked in the new statistics of humanity, spoiler: humanity failed. *I am of course, the bug*

[@Rakinjo2]

So light is like.. Noises that we hear with our eyes..

[@ADIIIIIIIIIIIIIIIIIIIIIIIIIIII]

Lol I guess so?

[@Rakinjo2]

Well.. What else would it be? If light, radiation, radio-waves and sound are all basically just variations of the same concept, then.. Is there actually a difference between sight and sound other than the way we perceive it?

[@ADIIIIIIIIIIIIIIIIIIIIIIIIIIII]

Rakinjo2 in a way i guess

[@Rakinjo2]

Faze Legend You guess a lot!

[@ADIIIIIIIIIIIIIIIIIIIIIIIIIIII]

Rakinjo2 i "GUESS" so XD

[@apple54345]

So this photon walks into a hotel.. While at the check-in desk, the bellhop arrives beside him and asks "Can I take your bags for you, sir?" The photon replies "No, thank you. I'm traveling light."

[@snehadavid7533]

>v

[@LapisStone]

nailed it

[@medexamtoolscom]

A photon walks into a hotel. But you can't ever be quite certain of that since its wave function never falls to zero even outside the hotel. Sorry, that was a stupid joke, but I couldn't resist.

[@strokernut]

@@medexamtoolscom Both were pretty good, in my opinion

[@nascarcricketer4702]

Nice my guy

[@stensoft]

Fun fact: photons do not experience time. For them, the very same instance they are created, they are also destroyed, whether it seems to us to take microseconds or millions of years.

[@kadeacon]

+Jan Sten Adámek So, photons are not matter, because they are created and destroyed? Also, how are photons destroyed? By being absorbed into a black substance?

[@stensoft]

***** Matter can be created and destroyed as well, energy is the stuff that cannot be created or destroyed. Photons are indeed destroyed by being absorbed.

[@artwingtonr.4647]

+Jan Sten Adámek Vsauce?

[@stensoft]

Vsauce and Veritassium as well but mostly Wikipedia and a lot of books (Stephen Hawking is a really good author and this fact about photons I actually know from his books)

[@dragonlord23411]

+Juan Diego E=mc^2. Energy and matter can be converted to the other, thus matter can be destroyed by becoming energy and energy can be destroyed by becoming matter.

[@matthewc5640]

What's really mind-blowing is that from the perspective of a photon, it hits its target of absorption or the universe ends as soon as it's created, since it doesn't "experience" the passage of time

[@krupt5995]

Exactly. Not to mention that the universe is flattened into a single plain perpendicular to it's velocity which is weird if we consider the universe to be infinite. From it's prespective it measures it self to be moving at a speed of c NOT 0! Also, everything else for that photon is going to move at the opposite direction in the speed of light. Even objects with mass, meaning that they are going to have infinite kinetic energy. It truly buffles me to think how would it be like if we could run at the speed of light relative to the earth for example.

[@TheSnoeedog]

the photon doesn't "experience" anything. While I recognize you're using the term more metaphorically, the fact is that, as far as we can tell, to experience anything requires a minimum infrastructure. That infrastructure couldn't operate coherently at the speed of light.

[@kccorliss3922]

Maybe it doesn’t experience time because it is a just a vibration of space, time.

[@kronos444]

Watt is light? Baby don't Hertz me Don't Hertz me No Morse

[@manuelpinero4712]

hahahahaha I like it

[@squiddi1393]

kronos444 All of those things have nothing to do with each other. L

[@ShovelChef]

You could fit them together if you reeeally wanted to.

[@LuckyFlesh]

Nothing in common? It's all about Electromagnetism. Watt is a measurement of electromagnetic power (current times voltage). Hertz is the frequency of the electromagnetic wave. Morse is just patterns of opening and closing electromagnetic circuits.

[@lambsum]

;)

[@rohanlp6403]

this channel is better than ted-ed

[@rohanlp6403]

now billions of people disagree with me...

[@omkarchavan5940]

+Rohan Rahman not better but not worse too. I think they both are at same level

[@Boborbot]

+Omkar Chavan Ted Ed's videos don't feel nearly as polished, visually or script-wise.

[@neeneko]

+Nitay A. Ted in general has also had increasing problems with quality control, with people producing content without really having the background to do so, but wanting to appear like they do. Ted has become high profile enough to attract people that probably are not terribly good for it.

[@ClearInstructionsOnly]

+Rohan Rahman And even better then Clear Instruction, I guess.

[@mageofmangoes8099]

This video was very enLIGHTening. I feel so much BRIGHTER.

[@vivianchan5825]

Ha ha ha

[@naryosh_]

Noice

[@marinan9418]

AngelWing 222 this is why people don't like you

[@mageofmangoes8099]

+Ivana Stojanović Sadly, you're not wrong.

[@cade-parkvilleproductions1039]

It shed some light on many things I didn't know about light before.

[@controlequebrado4455]

"What is light" baby don't blind me Don't blind me No more

[@-OsterJP-]

I just left a comment referring to this song lol

[@Basil_Flowerz]

hhhhhyes

[@apucsw_ahn]

That's what I'm expected comment, lol :D

[@LapisStone]

am i the only one who pressed "no more" thinking it would show more? yes? ok... just checking 😂

[@medexamtoolscom]

I actually expected I would see a comment like this, and that's actually why I started reading the comments, to see if I could find one. I thought it would just have changed love to light without changing anything else though. But I think a better execution would just be "What is light?" followed by 4 new lines, so you have to click *Read more* to get the punchline.

[@RainingApocalypse]

Remember when Kurzgesagt used to reply to comments?

[@kurzgesagt]

+RainingApocalypse Good times.

[@thegovernerful]

Man, he got you good.

[@arsyadzainudin9155]

Remember ya right....

[@aphoticlight]

+In a Nutshell - Kurzgesagt Ahahaha good one bro.

[@origamigek]

Social engineering at it's finest.

[@jplabs456]

‘The twin paradox, quantum stuff?’ I just love this channel.

[@pianoenthusiast]

i think they've forgotten about it :v

[@SuperTf2rocks]

2:30 That electron was adorable

[@thehomieofepicton]

Weeeee!

[@squid_cake]

Ikr (ಥ﹏ಥ)

[@lilysantiago679]

No.

[@themenace1975]

When you think about it , we never see things immediately , there is always postponement that depends on how much time needed for the light to touch the surface of the thing and then reflect towards your eyes , but we don't feel this postponement because the time needed is just too short for our kind to notice it , however the longer the distance is the more noticeable it becomes , take for example the dead stars that are hundreds of millions light years away from us but we are still witnessing the light that is still travelling through the universe carrying the star's image . It's like watching a livestream of match through an extremely slow internet , you are still waiting for your favourite player to make his move while the match in reality ended 10 minutes ago

[@BillAnt]

Nothing is truly live in the Universe, even a meter away from your screen, the light has a small delay followed by the perception of your brain... in a nutshell, like a sports announcer says "Play the video tape!" At 3:36 is what keeps me up at night thinking about why constant "c" is what it is throughout the Universe, and why not some other arbitrary number. Hmmm....

[@charcinogeneticist]

Light is electromagnetic radiation that can be detected by the human eye. Electromagnetic radiation occurs over an extremely wide range of wavelengths, from gamma rays with wavelengths less than about 1 × 10−11 metres to radio waves measured in metres.

[@medexamtoolscom]

Well fyi in actual practice you don't see anything hundreds of millions of light years away when you look out into the night sky, you would need a serious telescope to see any of that stuff, the stars you see are mostly pretty close. There are a few very bright ones that are thousands of light years away like eta carinae though, and you may be able to faintly see the andromeda galaxy but that's as far as you can see without serious help.

[@pray4us955]

We also all see differently. We use context and standards to normalize what we see as a mass. I have no clue the way you see me from your eyes and never could.

[@psammiad]

Why is light like the navy? Because they both travel at c...

[@MrRushSkies]

It took me 30 sec hahaha!

[@ThePowerSerg922]

HahahahahahahaHHhhahahHhahHhahahHhaahHhahHhhahahahHhahuHHahhHhuauhUhuahuhauh

[@reubenmartinez2825]

I'm mad at how hard I laughed at that. lol :)

[@mkal1532]

I'm smiling and I hate it

[@redmeister6758]

I c what you did there.

[@marcuswebb9434]

Well done, you've condensed about 4 scishow crash course videos into a 4:40 minute video compared to 40 minutes and made it a billion times easier to comprehend I commend you

[@meganerd14]

"-which is still way smaller than a hydrogen atom." ...I dont think I'm ready for this video...

[@Br0kenMask]

triggered?

[@tomascanevaro4292]

do you even know what triggered means?

[@KvDenko]

I had to watch that part twice

[@mrpepperonipizza3287]

Oh I'm all in for it

[@mrpepperonipizza3287]

@Plazma03 since your name is Plasma I would expect you to know that hydrogen atoms are made of photons and electrons which makes energy smaller than that light is part of the energy range just not as small as you see the comparison with a penny and the moon

[@SadiaAfrin-kq1ol]

I'm always amazed at the animation they create to co with the contents, besides the amazing contents ofcourse!

[@loaduscoolclipz5505]

*Light is the opposite of heavy*

[@acutebutdangerouspickle38]

Elmy actually it's spell *LITE* not *LIGHT*

[@MistedFall]

Lol.

[@shortcatz]

neurax reaper lite is an informal variant of light

[@thanhloanle6239]

no

[@thanhloanle6239]

neurax reaper ur just sounding it out

[@youssefkandeel145]

Listening to this now after studying about all these things is definitely different than years before when I was hearing this for the first time

[@normhiscock352]

Light could go faster if it stops zig zagging...

[@normhiscock352]

@Light you're grounded...

[@fujen8684]

lol Jolly good show XD

[@mrpedrobraga]

Just like human life

[@juancruzmunoz5963]

XDD

[@huytrandang277]

Not possible

[@jormungandr5563]

“One existential crisis please” “How original...” “An existential crisis about light” “Daring Today aren’t we!”

[@hereLiesThisTroper]

What is light? Baby don't hurt me, Baby don't hurt me, No more... *proceeds to bang head*

[@Slenderman63323]

Still a good song in my opinion

[@undeadmothjiangshi]

ECCENTRIC 2:57 lightbike

[@fettychow7648]

Klucky fried mayos

[@livefree3884]

Yes

[@livefree3884]

@@Slenderman63323 no

[@georgemissailidis1504]

When someone tells me what light is, i will say *_Light is the connection between us and universe._*

[@negyt7665]

@trinity nuggets Baby don't blind me. Don't blind me, no more.

[@thebreakfast8055]

Yeah. As if we aren’t part of the universe

[@superdrabde7117]

Goku: fuses with picollo Gicollo: Dab

[@rickrobitaille8809]

True but light doesn't care about you or me

[@0wired0]

Rick Robitaille light doesnt care about your feelings

[@MegaMitchZero]

Light is a teenage boy who gets a magical notebook and goes on a wild adventure of friendship in the show, Death Note.

[@ruinenlust_]

And I just finished Death Note. Why does it always happend that when I finish something awesome, I read comments of EXACTLY that series for the first time? Happened to Code Geass & Attack on Titan as well.

[@nyagineko5064]

*slow clap*

[@matisek274]

+MegaMitch Stop pulling some stupid anime into this you weeaboo! Unlike you,i am not a stupid wapanese! You are a total wapanese weeaboo! And light,is not a teenage boy from an anime but it is something which belongs to the universe,so please piss off you wapanese weeaboo.

[@ruinenlust_]

Erik Ondrejkovic hahaha I've watched 4 animes, I know who Light is but nobody here is a weeaboo.

[@funkygecko]

+[ IFDIFGIF ] is code geass good for death note and aot fans? I really liked death note and i have read that they are similar. Reply plzz

[@spirituser7354]

This channel is so underrated. It should have minimum 40 million plus subscribers. I got this video recommended by youtube after 5 years. It hurts to see youtube broken.

[@vari1535]

Request: “What is humor?” Explain why we find things funny,p. :)

[@danielhuang2488]

hey everyone, like this comment up here so they can see it.

[@FireyDeath4]

Anyway, VSauce sounds like it'd suit that question better.

[@ItsekulGaming]

That question is not for this channel

[@cornishcactus]

Social bonding, cheers and gone

[@flatmarssociety4614]

@@FireyDeath4 Vsauce is now dead

[@Jombo1]

It would be really cool if we could see a larger range on the electromagnetic spectrum.

[@herlax2]

NO! If we see heat and sun ultraviolet everything is going ULTRAPURPLE-RED!!!

[@warriorcast8567]

it would hurt your eyes if you saw it all at once

[@caiodecastro8596]

We can, we have already build machines and cameras to do that, it can be argue as an extense of "human vision". If you want to do it anytime with your eyes, than we cant rigth now, but will mostly get into it someday. Transhumanism is the future.

[@dunn0r]

Many birds and most (all?) insects can part of the UV spectrum. Some animals, like pit vipers, can also sense infrared.

[@Jordan_Dossou]

Jombo ask a mantis shrimp to describe light for you

[@swampaids]

1:35 the bottom right "This image is a lie"

[@luismedina5792]

What is the truth then

[@amandalaboy1449]

udontnomynamesostop tryingtonoitustalkers wha

[@FlSCHL]

It means that the visual representation of it is not necessarily correct

[@reniernavarro9972]

ud nontnomynamesostop nSeeepppRrrtryingtonoitustalkersrre

[@lilysantiago679]

C is the speed of light.

[@Skirot]

3:41 "I'm just built different" -The Universe

[@potawatomi100]

You guys are the best. This was smartly scripted, well narrated and you produced it in an interesting and memorable way. Well done.

[@gideonleezhongsheng8808]

REME 7hvvvhu

[@gideonleezhongsheng8808]

Sorry my screen cracked

[@Boborbot]

Is there anyway that we'll see the video you killed? (See endcard)

[@kurzgesagt]

+Nitay A. Absolutely not. We need to 100% remake it.

[@Sean_735]

+In a Nutshell - Kurzgesagt Make a second channel for -fuckups- videos that are "not good enough." People who don't want to see them won't have to, impatient people can see them early, and curious people can see what you refer to as a -fuckup- "not good enough" video, and feel bad about how your standards are so high compared to theirs.

[@tusenbensen334]

+Seanathon James smart person with good suggestions.

[@rohanlp6403]

+Seanathon James agreed

[@Thecawesomeone]

+In a Nutshell - Kurzgesagt Could give it as a sort of patreon reward?

[@IJoeAceJRI]

Light is useful. It helps us 'c' things.

[@michaelhartmayer1894]

that was 'relatively' funny ;)

[@hamozbrothers9172]

Oh I get it hahahahahaha 😄😄😄😄😄😆😆😆😆😆😆😂😂😂😂😂😂😂🤣🤣🤣🤣🤣🤣🤣🤣🤣

[@SR-uz1ov]

Genius

[@Sol_Smiley]

I don't care what anyone says. Kurzgesagt was always amazing in quality. I remember watching this vid when it originally came out, and I was gobsmacked. The quality in every sense was enlightening. Good job Kurzgesagt. Good job.

[@MrBlackHui]

What is Light? Baby don't hurt me!

[@Lizzymun]

+MrBlackHui Watt is love. Baby dont hertz me! Dont hertz me! No morse

[@ClearInstructionsOnly]

+MrBlackHui No more....

[@unlimited-edge]

Damn it I was gonna say that... You get a like

[@tarsofelix4414]

+MrBlackHui The internet never disappoints me.

[@rbrn9]

+MrBlackHui I don't want herpes, no more.

[@cuaroz5808]

4:04 The shadow just moved with the tan bird! I didn't know shadows could jump!

[@lionelmessi8380]

nice observation

[@HeavyRayne]

What did he mean when he said that the photon's wave-particle duality is a lie?

[@AnaseSkyrider]

+HeavyRayne I think he was referring to the images and depictions of it.

[@ProfessorEGadd]

+HeavyRayne Possibly he means that both waves and particles are lies - both exhibit wave-particle duality, so they are both the same thing. Picking out photons as examples of w-p duality is therefore unfair, because everything could be example.

[@alexandrugheorghe5610]

+HeavyRayne I have the same feeling. They exposed it incorrectly and most probably they meant what @ProfessorEGadd is hinting at. Anyways, any fundamental particle does exhibit wave-like particle duality it's just that when we look at one the other collapses and we get the famous experiment for the double slit. Here's a better depiction actuality which corrects the script: upload.wikimedia.org/wikipedia/commons/transcoded/e/e4/Wave-particle_duality.ogv/Wave-particle_duality.ogv.480p.webm

[@loacc3672]

+HeavyRayne - This is consistent with Anase's comment above, but I think the lie is that light is neither particle nor wave nor both - each mathematical model (that of particles and that of waves) can say something about how light behaves, but neither can tell the whole story. It's a lie that makes quantum mechanics more accessible?

[@ProfessorEGadd]

Alexandru Gheorghe To reiterate - all particles, fundamental or not can exhibit wave-like properties under the right circumstances. The largest things that have been observed to do so are quite sizable molecules, but in theory even people or planets could do so too. I also think you are confusing wave-functions and wave-like properties. The wave-function of a particle describes it's behaviour, which may (or may not) be wave-like. It's wave-function collapses when we observe it because it goes from potentially doing anything to doing exactly one thing. One cannot speak of wave-particle duality 'collapsing'. What you mean is that sometimes it is easier to explain phenomenon AS IF the particle was either particle or a wave, but not both. In fact there is no such thing as 'wave-like behaviour' or 'particle-like behaviour', because they are the same thing. They are nothing more than useful, historical constructs with a number of convenient, familiar analogues. Sometimes, such as in electron microscopy, it is necessary to consider both the wave and particle nature of a particle simultaneously.

[@somedoof1831]

Kurzgesagt: *asks a deep question* What Is Light? also Kurzgesasgt: puts a snail on the thumbnail

[@Amy-si8gq]

SNAIL????

[@somedoof1831]

@@Amy-si8gq thats what that is right?

[@Star_light568]

@@somedoof1831 no an ammonite

[@jeffsesos4596]

its a nautilus

[@Star_light568]

@@jeffsesos4596 no an ammonite

[@Spacie.AnnaMaria]

Holy cow. I was supposed to sleep, now my fatigued brain is confused

[@Rakinjo2]

it's 3:30 in the morning, and I'm in exactly the same situation.

[@Kattensimba]

6:35 for me XD

[@Spacie.AnnaMaria]

Hahaha XD

[@Spacie.AnnaMaria]

̈ Did you sleep at all ?

[@Kattensimba]

Anna-Maria Helou no i just use energi drink

[@bobetdelossantos971]

Questions like this makes me question my existence

[@lonestarr1490]

+bobet delos santos Whose existence?

[@HexPLAYSPlus]

+Lone Starr A girl is no one

[@lonestarr1490]

+Hex PLAYS Lie.

[@HexPLAYSPlus]

Lone Starr A girl is no one!

[@lonestarr1490]

+Hex PLAYS *smack* *smack* *K.O. smack*

[@paultoensing3126]

I love that you’re adapting your format a bit, even for a time or two. It’s a smaller time commitment and that’s an easier nibble. Please mix it up.

[@AJoaquin305]

You started confusing me in 45 seconds.

[@jinkim3186]

I think light behaves as the wave-particle duality, because it travels outside of our observable time frame. Due to physical limitations, observers can only observe things that have already happened. By the time they detect something, it has already happened in the past. Light, on the other hand, moves so fast that it's always at the present moment as things happen in the linear time and physical space. Basically, light will always move slightly faster than a physical observation, so it seems to exist all over the place as a wave of probabilities until it has finally been observed, at which point the light has already become a part of the past(time frame we can observe) as a particle, or an information of a fixed position of light that has been observed in this particular space-time. Looking at it that way, light perhaps exists at the borderline between matter with mass and non-matter. C, the speed of light, would most likely be the maximum frame rate of the material universe, because it exists right on the speed limit. Anything slower than light would produce mass(a fixed position in space-time which is perhaps what creates gravity), and anything faster would probably leave our linear time frame and become unobservable by direct physical means. Meaning light would appear as a wave of probabilities the moment before we detect it due to light being outside of our fixed space-time, and it would appear as a particle after we do observe it and it becomes a part of the past. But it only appears as wave-particle from our linear time perspective for both cases. It is quite possible that light exists as some other state above the C barrier, but we're only able to see it as light in the physical universe, the same way 2D beings would only be able to see flat shapes when looking at 3D beings.

[@XDvard]

you guys really like hexagons

[@overloader7900]

Who don't?

[@ultraviolet.catastrophe]

Maybe the video was made by a bee 🐝

[@mariafe7050]

the bestagons

[@sovereignsaiyans3057]

I really respect this channel knowledge and confidence of stating what we do know as admitting still with confidence what we don’t know yet... even the part of what we don’t know yet is just as informative from what we do know. This is a great channel

[@poisonhemlock]

But candlelight never travels at c because a candle cannot burn in a vacuum, CHECKMATE!

[@poisonhemlock]

Checkmate. I said it already.

[@poisonhemlock]

Thanks! :)

[@poisonhemlock]

Obviously not.

[@robothawkgaming]

+Danny Kim light slows down in our atmosphere, since a candle cannot burn in a vacuum, candlelight will never originate going the speed of light, however it may speed up if exposed to a vacuum.

[@robothawkgaming]

+Danny Kim I'll take your word for it, I'm just running off of the Physics class i'm taking right now.

[@Ambra2003313]

What is Light? Baby don't blind me Don't blind me No more

[@razelm]

+Ambra Cornea WHAT IS LIIIGHT

[@kirubellemma5360]

+Ambra Cornea what that doesn't make sense.

[@mauriciovillalba]

I just came for this

[@rockirol1]

was just thinking about this song

[@Spacie.AnnaMaria]

Why am I laughing so hard

[@thomson1761]

do a video on diffrent ideologies like socialism, capitalism and communism for example. May help take away the socialist fear in the US.

[@kennethlim8821]

That is a good idea but that is a sensitive topic so might take a while to get it unbiased

[@ObservableFiction]

+Kenneth Lim Well they made a video about the immigration crisis

[@Boborbot]

+Kenneth Lim they had no problem uploading about the migrant crisis, but it certainly was biased. So I don't think they'll mind talking about the subject.

[@canaldeFerniNY]

+ObservableFiction if you mean the refugee crisis, it is made and upload. Check it out

[@midgetwars1]

+Thomson Not hard to do. Capitalism = Person control. Socialism = People control. Communism = Gov Control.

[@atlas2296]

"What is Light?" *What is Something? video flashbacks*

[@wowodys]

“Light is a particle and a wave, however this is a lie.” What’s this mean?

[@Astronomynatureandmusic]

Because it is not exactly a particle and not exactly a wave. No one has ever observed a single photon. Knowledge about light is only derived from measurements, theories and axioms. Although we have come very far in understanding, some behaviour of light still baffles researchers. One could say that a photon is a photon is a photon - because we do not have a real watertight definition for it such as 'this is matter' or 'this is a wave'. Everyone saying they got a single closing definition for what photons are is either playing God or being a bit too sure about themselves. :)

[@danielhuang2488]

@@Astronomynatureandmusic wow! that taught me a lot about light. thanks for the explanation!

[@eliwoodnguyen1505]

@@Astronomynatureandmusic oh That just Blew my mind Im not ready So not ready Because all i heard or learnt was "light is a wave" then now ? O.M.G

[@scorpiistar]

duality of light comes from youngs double slit experiment which showed that light propagates as a wave but becomes a particle when OBSERVED. this is a lie, because you do not observe LIGHT, you observe a simulation of light.....incandescence. also 'speed' of 'light' is an illusion. light does not move. an example: newtons cradle.....if you extended the balls all the way to the other side of the milky way and dropped the first ball, its energy would be transfered to the last ball on the far side of the galaxy, not at the "speed of light" but INSTANTANEOUS~LY. modern psyence is BS & these facts have been known since ancient times

[@MrTeddy12397]

@Siniestro Triggered. God is real, and i'm going to kill it.

[@Basilahi]

WHAT IS LIGHT !!! BABY DON'T HURT ME DON'T HURT ME NO MORE

[@frederickang7058]

Lincoln Osiris what

[@michagrill9432]

@@frederickang7058 it's quite an old song exept its love instead of light XD

[@svartdraken]

I have opened the video only to leave this comment

[@WaffleSauze]

baby dont blind me... no more. sorry bud you had your chance.

[@matiascassiacomerio6916]

The same song came to my mind while reading the videos´ title

[@keheck]

Kurzgesagt: "What does make visible light special then? Nothing!" Also Kurzgesagt: "Visible light is the only set of electromagnetic radiation that propagates well in water"

[@charcinogeneticist]

Light is electromagnetic radiation that can be detected by the human eye. Electromagnetic radiation occurs over an extremely wide range of wavelengths, from gamma rays with wavelengths less than about 1 × 10−11 metres to radio waves measured in metres.

[@Pawlicktics101]

Light is never seen. Illumination is what we perceive. Light is a disturbance in the ultimate field in which should be correctly termed ," Ether ". Light is electric by Nature. Most of the Ancients understood this. The great minds that were before us allow us to stand on there shoulders.

[@jbgzpnt]

"Light is the connection between us and universe." ... so how about blind people?

[@spyrat8789]

Those people shall we say will be connected with the universe in due time..

[@sophyjoby655]

Wow.......that’s deep 😐

[@Farhankazmi.06]

Still got vibrations tho

[@Iwillfightcauseigotnothing]

they can feel the sun's heat so....

[@dinkusstinkus4396]

"people"

[@obayaahmed4048]

the wave model of light: im a joke to you kurzgazat: yes

[@itsastrobit]

Do not go gentle into that good night. Rage, rage against the dying of the light.

[@nirajjha812]

3:36 I have a answer: Light of speed is finite because as said by ALBERT EIENSTEIN , when speed is increased the time slows So we could say that when we reach speed of light the time stops and there is no acceleration at all without time here two theory works: Time dialiation Length contraction

[@gau3463]

fuzzy-hair crackpot

[@Ahmed-tz7fz]

can you repeat that in english?

[@RESECEO2464]

This channel is one of my fav science channels on this app.. SUCH good animations and information .. perfect

[@mixis1931]

"In a nutshell, light is..." ROLL CREDITS!

[@blahthebiste7924]

@Francisco Nieves WTF does that even mean?

[@alpakapucuf3394]

@Francisco Nieves godzilla had stroke while trying to read *THAT* and fucking died

[@YourLocalCafe]

Worry not curious repliers who didnt get the joke, the joke is basically yhat light is so fast that the video ended just as it began.

[@robfunkhouser3793]

Light actually doesn't travel the speed of the universe, bc it would then outpace the speed of the universe, which isn't possible. Light is slower than the expansion of the universe, which encompasses everything we know, at least for the moment.

[@flo_for7636]

Me being like: Ohh interesting, light waves move at the speed of light, good to know.

[@flo_for7636]

Mondo Duke, thanks I guess ;)

[@Mathiasisneat]

The small text in this video makes me happier than it should

[@ashtoncollado6192]

Honestly, information like this and information found in other videos by kurzgesagt, is the reason I'm not religious. All respect left aside, I can't deny knowledge like that for the sake of "faith". It's just primitive in my opinion. We should all strive to understand our universe correctly.

[@akdude81]

For me, the more I study physics and the universe, the more it strengthens my belief in God.

[@volcryndarkstar]

Preach

[@KrazyPlonk]

how does knowledge like this contradict religion?

[@chorosso5259]

KrazyPlonk _beware before reading this, the comments used are dramatisations_ well, some people think of it like this, "this was just disproven, that means anything else can't be true" and people like akdude81 think of it like this "oh, this is amazing, this proves god exists if it's this complex"

[@akdude81]

***** Actually, I find the order in the universe to sustain my belief in God. One of my physics professor (who is atheist, as most are) says it is a miracle (and he doesn't like that word) that we live in a universe that can be described with mathematics. The physics didn't invent the mathematics to describe the universe. The mathematicians figured out the math just for fun, and the physics were able to apply it later.

[@Fif0l]

God here. When we do some maths with differential forms of Faraday's and Ampere's laws you'll get an equation of a wave. from this equation we get c^2=1/u*e, where u, magnetic permeability of vacuum and e, electric permeability of vacuum so, the speed of light is a square root of the product of these two constants.

[@Fif0l]

#SpilHype science!

[@ebcfpv4312]

what

[@ashleyez2022]

Yes, but that didn't prove anything. We know that. Can you explain why?

[@Fif0l]

Ashley Well, that explains why the speed of light is not infinite. What it does not explain though is why is the speed of light the fastest speed of causality.

[@Kaserbeam]

So, e=mc^2? A century or so late there God

[@1ucasvb]

"The smallest quantity of energy that can be transported" is pretty misleading. It implies an universal quantization of energy, which isn't really an accepted notion. Frequency and wavelength are, as far as we know, continuous quantities. This means you could in principle have a photon with an arbitrarily small energy, or two photons with an arbitrarily small energy difference.

[@patrickyhsong]

+1ucasvb I believe that the quantisation of energy is well accepted in the scientific community. And frequency and wavelength are still accepted, well-established concept. I suppose that's where the whole particle-wave duality arises from?

[@1ucasvb]

Quantization of energy arises in several contexts and different systems, but there is no accepted notion of "smallest amount of energy possible in the Universe".

[@patrickyhsong]

Oh, OK.

[@1ucasvb]

+Sum Vigil Energy quantization arises from boundary conditions in quantum systems. Unbound systems have a continuous spectrum of energy. An unbound electron, for instance, can have an arbitrary amount of kinetic energy if you simply change to an appropriate frame of reference. Second, a photon can have arbitrarily small energy as far as mainstream theory goes. A photon could conceivably have a wavelength the size of the visible Universe and beyond. Some upcoming theories do propose further quantizations of energy, time, space, etc., but that's not generally accepted to be true right now.

[@DrBernon]

+1ucasvb I think is misleading because some photons carry more energy than others. it even says it on the video!!! But anyway. the idea of a quantum universe it the most likely because there are alot of phenomenon that could not be explained without it. At the same time you could say that all scientific videos are misleading, because they are all theories. So my point is that is ok to say something that is not "true" if it is the most likely, because is better to have an explanation to something than having nothing.

[@TOBuhrer]

Kurzgesagt: "But we will explore this theme in a part II video in the future" (everytime you hear this know that it will never happen..)

[@Chouchouruanruan]

This video is way more comprehensive than my physics lesson in highschool

[@erezsolomon3838]

true

[@rajatbarwal6436]

Don't blame schools u won't get it this better anywhere else's too!! Mans legendary

[@ZSXDFV]

Baby don't blind me, don't blind me, no more

[@Haik0]

Pfff, why would anyone dislike this video? :D

[@neeneko]

+Haik0 electric universe proponents?

[@gasmanoo]

+Haik0 Maybe they are from negative universe where matter was replaced by antimatter and thus everything they do is negative ?

[@angelbar]

+Haik0 They are Blinded by ignorance, someday they will see the light... dont worry

[@patu8010]

+Haik0 You mean those 8 bots? Pff.

[@alexandrugheorghe5610]

+neeneko Hell no! Those are the Aether adepts.

[@markleng67]

0:27 "Photons can't be split, only 'created or destroyed'". Doesn't that conflict with conservation of energy? (1/2 laws of thermodynamics).

[@303gamer6]

2:03 this noise comes from lego batman 2 when people use lasers

[@sudhanshusekharpanda5562]

Finally I got my answer 8yrs back when I asked this question

[@Gassy1337]

i need to do my home work!!!!! AGHHHHHHHHHH!!!

[@deanenares-wormald6227]

same!!!!!!!!!!!!!

[@MegaMGstudios]

me too

[@rickypham9453]

QuestGiver me too

[@duwb0]

the answer to question 2 on your next test is B You're welcome

[@bobbelzonnebril8872]

OH yeah thanks for Remembering me

[@PikaPilot]

Coming back to this video after finishing physics 2... This video is hopelessly short, and yet does its best to cram all the info it can in 5 min.

[@danielevans5663]

I would want this guy to narrate my whole life

[@apple54345]

Imagine having a life worthy of narration :(

[@XyBeatZHipHopInstrumentals]

Become a patrion now 😂😂

[@Zbra1]

A few simple calculations later and I now know that gamma radiation does 30000000000000000000 waves every second.

[@hummaidzafar2666]

How you did that

[@arulgk9673]

Humaid Saifi Speed of light/Wavelength = Frequency (No. of waves per second)

[@TechPacer]

Only if Speed of light acc. To your approximation is 3*10^8

[@thirtytwenty]

this channel teaches me more than i will ever learn in school

[@randomthingsinmylife]

True

[@broncos435]

not that i don't like their slimmed down theme song now, but the funkiness of that bass and the the little "doo doo doo" at the end really makes this one hit different for me

[@DjSapsan]

*Can black holes bend the gravity waves? If not, in linear gravity waves faster than light* =)

[@TBFSJjunior]

What does the speed of light has to do with the speed of gravity waves and black holes? Light is absorbed by black holes due to their mass (kind of). I don't think gravity waves have this "kind of mass", and get bend like light does. (But I could be mistaken)

[@DjSapsan]

***** vk.com/feed?section=notifications&w=wall-36127559_634738

[@1_____________________]

+DjSapsan Could you explain what you mean exactly? Like how you got to the conclusion.

[@AnaseSkyrider]

+DjSapsan Gravity travels at the speed of light. Problem solved.

[@DjSapsan]

Anase Skyrider yeah, but if put straight line from one planet to another, then gravity will coming early =)

[@CowfaicdRealm]

I'm really looking forward to a possible video on the twin paradox. I don't know much about quantum mechanics but I'm really interested in it!

[@rationalmartian]

+Cowfaic'd Realm The twin paradox pertains to relativity. Not QM.

[@CowfaicdRealm]

rationalmartian Oh, excuse me, as I said, I don't know much about this stuff. I'm interested in knowing some more of it, but I don't know much about it.

[@hipcolour]

Could you please make an episode of What is love? dont hurt me no more

[@kingpotato7183]

Hip Colour love is your brain telling you to fuck somebody once told me the world was gonna roll I ain't the sharpest tool in the shed, she was looking kind of dumb with her finger and her thumb with a shape of an L on her forehead hey now your rockstar get your show on get paid

[@tuxedo_productions]

Reads the first line Plays what is love in my head Hits Read more Writes this comment.

[@Azenith-]

HiP CoLouR Love is the aftermath of an alien pooping in your brain

[@Bacon_Pancakes]

Love is an endorphin that causes you to reproduce and not eat your children. Easy peezy.

[@tesconstamylo]

@@johannesvonkleist6647 do not forget the adrenaline !

[@cameronlapp9306]

That fact about visible spectrum evolving based on liquid water absorption is fascinating - hadn't heard that before!

[@stewiesaidthat]

Water filtered out/consumed the energy from the UV and x-rays hitting the Earth's atmosphere. The highest frequency/wavelength in the ocean was the visible light spectrum of the EM wave. If it wasn't for water draining energy from the EM wave, would we still have developed eyes to see in the UV and X-Ray frequencies?

[@sajukkhar]

@@stewiesaidthat only if there was any evolutionary advantage.

[@fatihaksu837]

432 blind guys disliked this

[@vxdxnsh]

lol

[@deltamoon3301]

What if all hater are blind?

[@benjaminseidlitz4002]

How did they find the dislike button?

[@GDHURRICANE]

+Benjamin Seidlitz they used Braille

[@DaManBearPig]

burak kerten *creationist

[@JoeLocksammich]

"kind of a particle and a wave at the same time, although this is a lie" ...."although this is a lie"... okay thanks super informative

[@lilacosmanthus]

Many animals see UV light, like my budgies. Why can't we? Why did our rods and cones stop at visible?

[@huaen8880]

Uv light damages body cells. And most animals who can see them don't live nearly as long as humans to experience the damage, or at least that's what I think. Maybe we just don't need to see uv rays, while for other animals it's an adaptation for survival.

[@__Paprika]

+Hua En not all UV damages cells, anything under 13.6eV won't deal damage

[@cirusMEDIA]

+Indigo Osmanthus If our cones and rods could have also seen UV light then that too would have been called visible light! ;)

[@kiharapata]

+Indigo Osmanthus Probably because we don't need to. Some women actually have four cones (tetrachromacy), and do see some UV light, but this condition is rare. If it exists and didn't spread along the population, it's probably because tetrachromats don't have any significant advantage over us, and so the trait didn't evolve. Since we can distinguish everything we eat fairly well (e.g. through the contrast between reds and greens), we don't really need to see in UV. With birds and insects the situation is different, though, because one of their concerns is looking for specific flowers, which do have certain pigments that reflect UV light (in fact, do some research about that, I'm sure I've read somewhere that different species of insect/bird are attracted to flowers with different UV colourations, due to co-evolution).

[@lilacosmanthus]

Guilherme Pata wish we could do that. Sometimes a seemingly very fresh fruit is actually... not so fresh :(

[@groundbreaker91]

This has actually been a question that I've pondered, and never really got a definitive answer on. Now I see why. I think my brain seeped out through my ears X_X

[@grakoe]

“So what is so special about visible light” Absolutely nothing.

[@Telencephelon]

wrong

[@islandonlinenews]

WRONG! If you take the entire electromagnetic spectrum and divide it by a ratio of phi to 1 visible light is right on the junction.

[@mrkiky]

@@islandonlinenews But what is the entire electromagnetic spectrum?

[@islandonlinenews]

mrkiky gamma to radio.

[@mrkiky]

@@islandonlinenews Including the 100.000km wavelengths? Or only the longest we currently find useful technologically? Because that's arbitrary. How short are the gamma rays? Shortest we have an application for? Shortest ever recorded? Shortest theoretical?

[@keelan270]

“Energy cannot be created or destroyed” “Light can only be created or destroyed”

[@ofekgillon10]

And its energy will be transferred... Nothing wrong here

[@louisuchihatm2556]

Electron moves from one energy level to the other. Uses Energy to release light. Where'd the original energy come from?

[@ofekgillon10]

Louis Krs This depends on the situation. cold objects in deep space do not emit light exactly because there is no energy in the electrons to produce light. some electrons gain energy from absorbing light (this is the power source of a lot of lasers), some get the energy from heat, and some get it from nuclear fusion (like the sun). There always needs to be an energy source that gives electrons the chance to be in an excited level from which they can fall to a lower energy level and emit light

[@athena9705]

baby dont hurt me

[@VictorNascimentoo]

Damn, youre faster than me

[@zarinachhadwalla2466]

The Flame Cat! O

[@rune.theocracy]

What is light? bby don't hoort meme!!1111

[@Rotem_S]

finally

[@kaanyandhi4105]

no more

[@christophergaspar6520]

i feel proud that i already knew 95% of the stuffs in this video from my high school studies

[@randomthingsinmylife]

😀