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!


  1. Kurzgesagt – In a Nutshell

    Kurzgesagt – In a Nutshell

    Jaar geleden

    There's brand new stuff in the Kurzgesagt Merch Shop. Check it out here: shop.kurzgesagt.org

    • Perfect2020Storm


      Maand geleden

      Very informative. Thanks for sharing. Best wishes, Lord-Jesus-Christ com

    • Matthew Lawton

      Matthew Lawton

      2 maanden geleden

      We do know why light has a speed limit. The Planck unit exists.

    • Cogz Fam

      Cogz Fam

      4 maanden geleden

      Could you do a video about galaxys because me and my best friend love space?

    • Seedname101


      4 maanden geleden

      Gotta admit this video disappointed me. Very uninformative

    • Nonderman 234

      Nonderman 234

      4 maanden geleden

      I need me dat p l u s h i e

  2. VoiDz Miner

    VoiDz Miner

    7 uur geleden

    Does anyone feel like he’s talking WAY faster here?

  3. Pawlinee Roblox

    Pawlinee Roblox

    2 dagen geleden


  4. Mightybunny_YT


    2 dagen geleden

    who else is here because ur 8th grade teacher told u to watch this

  5. Bilal Hellani

    Bilal Hellani

    3 dagen geleden

    Thank god imfound this channel❤️

  6. Jevonne Ledford

    Jevonne Ledford

    3 dagen geleden

    Thank for this video

  7. Anita Karol

    Anita Karol

    3 dagen geleden

    How about you speak a bit slow

  8. Rayyan Albalushi

    Rayyan Albalushi

    4 dagen geleden

    this video is very interesting and helped me a lot to understand the light

  9. Jörmun Gandr

    Jörmun Gandr

    6 dagen geleden

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

  10. DK


    7 dagen geleden

    Why do different objects reflect light of different wavelength even though the light falling on them is of the same wavelength? For example, why does wood seem brown under white light while a tree leaf seems green under the same white light?

    • ofek10


      6 dagen geleden

      This is similar question to why a long bass string vibrates with a low frequency while a short viola string vibrates with a high frequency: every system has a different response to different frequencies, and so to the absorption, reflection and scattering spectrum of different materials. The difference between these systems is how their electric charges vibrate when you try drive them. Hope this helped.

  11. Christopher Gaspar

    Christopher Gaspar

    8 dagen geleden

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

  12. Dasher VIP

    Dasher VIP

    14 dagen geleden

    The thumbnail is bloodnautilus from terraria, fight me :>

  13. kim Martinez

    kim Martinez

    15 dagen geleden


  14. Kenvick ED

    Kenvick ED

    16 dagen geleden

    I thought of weight before anything. I’m so slow

  15. ilhaan ilahi

    ilhaan ilahi

    16 dagen geleden

    I need a video explaining this video and another video explaining the video explaining this video

  16. Sam Anderson

    Sam Anderson

    17 dagen geleden

    nice vid

  17. Lucas Peters-Murphy

    Lucas Peters-Murphy

    18 dagen geleden

    So if light has no mass that means it can't contain any energy, so how does it set things on fire when magnified?

    • ofek10


      6 dagen geleden

      Why do you think that stuff without mass can't contain energy?

  18. Luc Makelele

    Luc Makelele

    18 dagen geleden

    So theoretically speaking some of the stars we see are stars that died ages ago

    • ofek10


      6 dagen geleden

      Yeah, this is actually a well known phenomenon and was used to detect things in general relativity (see one of the latest sci-show space's videos about a certain supernova)

  19. Life Explained

    Life Explained

    19 dagen geleden

    Very interesting

  20. RamdomUselesVidz


    20 dagen geleden

    I have been watching this channel for a long time now and it is more intresting and teaches more then school and i know more than others at school because of this channel now lol

  21. shafey mushtaq

    shafey mushtaq

    20 dagen geleden

    Anyone find it complicated?🤨🤨

  22. Senthi Velayutham

    Senthi Velayutham

    22 dagen geleden

    please don't change the intro

  23. Mine Duck

    Mine Duck

    22 dagen geleden

    Light: Movement, imparting movement, caused by movement. ^this is the abstract truth, that does not deny any intricate definitions thus following. Teach this as the foundation, and the mystery will have a concept for even children to grasp.

    • Mine Duck

      Mine Duck

      4 dagen geleden

      @ofek10 hello. I've talked this over with physics people before. You can refute this with your own abstract points, but in essence none of this is false.

    • Mine Duck

      Mine Duck

      5 dagen geleden

      @ofek10 but all straight force comes out of the curve, and goes back to the curve. The reason nothing touches is because matter isn't a thing, its movement itself. Its force/charge. It can only make itself spin away in its expansion/inspansion. Very simple but very true.

    • Mine Duck

      Mine Duck

      5 dagen geleden

      @ofek10 what I'm describing is the abstract movement of everything. It is spin, and sphering that 'makes' matter by separating it into its units. There are endless laws and consequence called physics and chemistry, but underwriting them all is the function that makes what we measure. Heat, light, electricity, are the same, gravity is the opposite of movement, of charge. Gravity is the conglomeration, it is the cold death..but in a reality where nothing touches, it becomes a capacitor of movement, like a battery or coil. So when an object has mass, like a planet, the more mass, the more potential energy, amd the more energy needed to get its curve straight again. Technically if the energy was introduced the earth could quickly become a fading dart of plasma. Straight is the electro/magnetic force. Gravity is that force as well, since its the same movement, but it is that forces negative.

    • Mine Duck

      Mine Duck

      5 dagen geleden

      @ofek10 try if you like, but if you can replace or refute what I wrote, I will hear it. To me its not, NOT this. Numbers are symbols and the one and zero do represent, on the number scale and as what they symbolize, the very beginning of reality. 2. There are only two shapes/directions/ways things may be, even in your imagination. Everything in existence is either straight or curved. Given that, I will divide forces into two. This is abstract mind you: straight (electric force/charge) and curve (gravity). So this division can take only two forms. In its omni-expansion, that being within polar volume, the straight force would naturally coalesce with itself, causing stagnation. However as you know, we live in a reality where nothing touches. Ever. So to avoid conglomeration, the straight curved away. As its doing this from amd at all directions, this 3d curving leads to sphering of motion. These spheres create separation, they form the units of matter as we know it. Each individual sphere at whatever scale of the movement. Continued...

    • Mine Duck

      Mine Duck

      5 dagen geleden

      @ofek10 this isn't about the grasps. Indeed physics is not light-minded knowledge, however it does not do much towards describing the causes of what it measures and defines I.e. origins. I wasn't taught what i am describing. In a personal effort to reconcile the discrepancies between plasma cosmology and relativity, I made a hypothesis of what the abstract foundations of reality are. I call it perspective theory. There is an/the expansion, for lack of a better word. In actuality, the expansion is a division. The origins of existence are symbolized in 1 and 0. something/nothing. Existence is 0 ÷ 1. The movement is a division, and the division is matter. How is it that simple? When the Greeks defined zero, they also defined the 'big bang's scenario. As defined, zero (nothing) has no value until it effects a value, yet is the basis of all values. We live in a polarized, cause and effect existence/reality/dimension. The opposite of nothing is something, and vice versa. This creates an issue, how could there be a nothing without a something to define it? This issue is the issue of inexplicable existence, it's an always-paradox. So to start, something and nothing had to both exist simultaneously, so 'something' separates from nothing. They are split, it is a division. 0 ÷ 1 = 0 (then it can't exist without something----->) so ÷ 1 again. This is the expansion, the division creates more 'nothing'. And naturally, volume is polarized. There is just as much expansion within all matter, as out. The only change is perspective. This concludes the first abstract lesson.

  24. Postboy Games

    Postboy Games

    22 dagen geleden

    Original What Is Love? This Channel:What Is Ligh?

  25. B o n k Time

    B o n k Time

    23 dagen geleden

    This man is putting nutshell the wrong way but its still great

  26. Official LEF

    Official LEF

    23 dagen geleden

    am i the only 1 thinking about rachet and clank because of music

  27. A-EYE


    23 dagen geleden

    Light is most important thing in the world

  28. Gijs Vermeulen

    Gijs Vermeulen

    24 dagen geleden

    i kanda prefer this animation style over the new style

  29. Caneca &Fósforos

    Caneca &Fósforos

    25 dagen geleden

    Title: what is light? Video: light is the connection between us and the universe. Me: understandable have a great day **closes video**

  30. Lost_AprilCatboy


    26 dagen geleden

    Stay away from all visual light [390 to 700nm] emitted by the sun. Stay away from all visual light [390 to 700nm] reflected by the moon.

  31. Aditya Tewary

    Aditya Tewary

    28 dagen geleden


  32. Unsaid Artist

    Unsaid Artist

    29 dagen geleden

    its funny how I kinda know what light is but i still clicked on this video

  33. Alex Mirkovic Vlogs

    Alex Mirkovic Vlogs

    Maand geleden

    Light actually has mass according to Einstein, because mass and energy are the same thing except that they are just written and expressed differently (E=mc^2). And since light carries energy it therefore must have a mass which is not =0.

    • ofek10


      6 dagen geleden

      No, this is not true. The equation you wrote is just for particles with mass. For particles without mass the formula becomes E=pc.

  34. matthew brown

    matthew brown

    Maand geleden

    baby don’t hurt me

  35. Hollow Head

    Hollow Head

    Maand geleden

    Is it just me or these animated story are better than any teacher these people make learning fun and interesting

  36. Baby Yoda

    Baby Yoda

    Maand geleden

    Still the best edu channel I know.

  37. Arandomdude11


    Maand geleden


  38. Jean Ding

    Jean Ding

    Maand geleden

    Imagine if this channel, Ted Ed and Veritassium made a video together.

  39. Hannan Kruger

    Hannan Kruger

    Maand geleden

    4:05 "For now, let's just be happy that we evolved eyed that pick up waves of information permitting the universe" People born blind: ⚫👄⚫

  40. bob sham

    bob sham

    Maand geleden

    What is light Baby don't blind me

  41. Devanshu Das

    Devanshu Das

    Maand geleden

    Light is KIRA...

  42. Thedabisme


    Maand geleden

    it makes me feel bad because they say its in a nutshell cause i cant even process nutshells

  43. Asriel Dreemurr

    Asriel Dreemurr

    Maand geleden

    If light were instantaneous the whole sky would be bright white because of all the stars galaxies supernovas etc, making us unable to study anything outside of earth

  44. Jezer Villamor

    Jezer Villamor

    Maand geleden

    baby don’t hurt me

  45. LoganxSupreme


    Maand geleden


  46. ForcesNL


    Maand geleden

    Hang on. Low frequentie moves as fast as high frequentie? At start maybe. But doesn't low frequentie waves decay much faster? While it's completely the other way around with stars. Blue is more violent, red lasts a thousand times longer. Aye because it uses less fuel to burn. Complicated. Why is there a contstant and why is it the same with sound. Very strange. But also very elegant, the way things work. It all seems so simple. Untill the as good as unpredictable electron comes along.

    • ForcesNL


      Maand geleden

      Oh wait. I get it. Loud noises and whispers travel at the same speed, and maybe as far. Same with light. High frequenties are just much easier to detect over time/travel/distance. It just isn't very important to me. Mass and the energy of two masses attracted to eachother is the only thing that mathers in the universe. Light nor sound can escape mass, so they don't mather.

  47. Chaika Stein

    Chaika Stein

    Maand geleden

    What is light? Baby don't hurt me Don't hurt me No more

  48. Huu-Nghia H. Nguyen

    Huu-Nghia H. Nguyen

    Maand geleden

    Baby don’t hurt me

  49. Machtheer


    Maand geleden

    Is light from your phone also moving with C? (299.792.458 m/s)

  50. Marwan Kamal

    Marwan Kamal

    Maand geleden




    Maand geleden

    If light is massless then it shouldn't have momentum because p=mv right then explain this exception?

    • ofek10


      6 dagen geleden

      p=mv is true only for massive particles that travel with a low velocity (Which is relevant to almost anything in our daily life, so that's why Newton thought that was the case, but in general it's false)

  52. Jalapeño and Banana Productions

    Jalapeño and Banana Productions

    Maand geleden

    Light is made out of light

  53. Justin W

    Justin W

    Maand geleden


    • Justin W

      Justin W

      Maand geleden


  54. Caio Henrique

    Caio Henrique

    Maand geleden

    He’s Kira

  55. Prateek Gupta

    Prateek Gupta

    Maand geleden

    We all know that kurzrgesast's " in another video" never comes

  56. Michael Frith

    Michael Frith

    Maand geleden

    Light is induction, by way of resonance.

  57. jalsr.speak237


    Maand geleden

    Eyes didn't evolve they were created.



    Maand geleden

    Understandable but



      Maand geleden

      Good nice

  59. The Holy Duck

    The Holy Duck

    Maand geleden

    "Ahhh, sweet photons. I don't know if you're a wave or a particle, but you go down smooth." -Bender Bending Rodriguez

  60. Poya Hasmat

    Poya Hasmat

    Maand geleden

    One needs to sit and ponder how a living organism less intelligent than us can "choose" to evolve features for its survival, such as eyes that see in the visible spectrum. It is mind boggling to think that one will accept chance as being a cause of all the existence, than to accept that there can be no creation without a creator. A needle will not come about by random events with infinite time at its disposal, eventhough the universe is finite and had finite time in existence. You need someone to create the needle, with all its simplistic shape, let alone a more complex feature such as an eye to evolve. It is more close to logic and science to accept that a creation must have a Creator rather than to accept that they created themselves.

  61. Liam Keogh

    Liam Keogh

    Maand geleden

    Is it possible to keep a photon still?

  62. Roberțel


    Maand geleden

    light is tentacle snail

  63. Jimi the Schmuck

    Jimi the Schmuck

    Maand geleden

    Visible light is a tautology.

  64. MosaSA


    Maand geleden

    Baby dont hurt me

  65. Muhammad Harris

    Muhammad Harris

    Maand geleden

    Remember the first intro... memories

  66. CanadaMoose


    Maand geleden


  67. Aymen Yousfi

    Aymen Yousfi

    Maand geleden

    ( C ) isn't about the speed of light. It is about the speed of causality. it's about cause and effect . it has to be finite . it's essential for the existence of the universe

  68. Waterprook


    Maand geleden

    If you play it at 2x speed, it will be faster than the speed of light

  69. koullis18


    Maand geleden

    What is light? Baby dont hurt me Baby dont hurt me no more

  70. Andrei Anthony Cuizon

    Andrei Anthony Cuizon

    Maand geleden

    Di ko tlga magets huhu:(((

  71. Andrei Anthony Cuizon

    Andrei Anthony Cuizon

    Maand geleden


  72. Andrei Anthony Cuizon

    Andrei Anthony Cuizon

    Maand geleden

    Hi mga klasmeyt

  73. HX3_EnFr


    Maand geleden


  74. isaiah lyons

    isaiah lyons

    Maand geleden

    So drugs that make your perception of time different means you are seeing light on a different frequency? Therefore what you’re hallucinating is real!? Right?

  75. TABC the amazing blue crocodile

    TABC the amazing blue crocodile

    Maand geleden

    Oh baby dont blind me, Dont blind me no more

  76. 1n5an1ty


    Maand geleden

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

  77. Matheus Santos

    Matheus Santos

    Maand geleden

    Baby don't hurt me, no more

  78. ryan sullivan

    ryan sullivan

    Maand geleden

    1:33 "this image is a lie"

  79. Denis Lacoste

    Denis Lacoste

    Maand geleden

    Однозначно, это лайк!

  80. Controle Quebrado

    Controle Quebrado

    Maand geleden

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

  81. Narindra Roberts

    Narindra Roberts

    Maand geleden


  82. Ominous Onion

    Ominous Onion

    Maand geleden

    What is light? Baby don't hurt me.......

  83. MinerMaster


    Maand geleden

    I honestly feel really bad for blind people :((

  84. Игорь Мансурович Мазитов

    Игорь Мансурович Мазитов

    Maand geleden

    Ошибочно показаны состояния возбуждения и потери энергии электроном в атоме. Поглощая фотон электрон не движется с одной орбиты на другую. Он там оказывается. Состояния между орбитами (движение) невозможны)

  85. Abi Rizky

    Abi Rizky

    Maand geleden

    What is love?

  86. Smily Explains

    Smily Explains

    Maand geleden

    Kurzgesagt: Uses smart words Me: I like your funny words magic man

  87. apku04


    Maand geleden

    what is love?....

  88. MrrMellowMan


    Maand geleden

    to answer the question just skip to 4:05

  89. Le Grando

    Le Grando

    Maand geleden

    What is light? baby don't wave me, don't wave me, Photon

  90. Ivandro Jao

    Ivandro Jao

    Maand geleden

    I stopped watching when he said energy can be destroyed

    • Arez Rain Orquiola

      Arez Rain Orquiola

      Maand geleden

      he didn't say that.

  91. KingSpoderMan


    Maand geleden

    From what i have seen from Vsauce The reason why light is moving that fast is that the faster you move the slower the time moves in your perspective. And for light. The time doesnt move at all. But on earth we can barely experience this since the fastest speed we reached on earth was only 2000 m per second. While light reaches hundreds of millions of meters per second

  92. Gio Maxa

    Gio Maxa

    Maand geleden

    i understood everything except for the moving charge of the electron thing

  93. MajWay


    Maand geleden

    What is light? Baby don't blind me, don't blind me. No more.

  94. thesteamybeanboy


    Maand geleden

    So Mr. Taylor here does other things too, so I like to imagine he’s learning as much as us

  95. Alucard Lord

    Alucard Lord

    Maand geleden

    So does this mean that fire 🔥 can also produce electromagnetic lights like the Sun does?

    • ofek10


      6 dagen geleden

      That's exactly what it is doing. Light IS electromagnetic radiation, so anything which produces light produces EM radiation (light bulbs, fire, the sun...)

  96. Tortric


    Maand geleden

    Baby don't blind me Don't blind me No more

  97. d mar

    d mar

    Maand geleden

    ok there was a hotel clerk checking in the next customer and he to the photon. Sir do you have any luggage? The photon replied "no I'm traveling light"

  98. Elena Mendiola

    Elena Mendiola

    Maand geleden

    i need to watch this again everything went in one ear and come out the other ear

  99. Ty Guy gaming

    Ty Guy gaming

    Maand geleden

    the ca- image is a lie

  100. Crazyderpie2007


    Maand geleden

    When you ask the smart kid whats light