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What Is Light?

Оценок: 97004 | Просмотров: 4754863
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. Music by: https://soundcloud.com/epicmountain/light https://epicmountainmusic.bandcamp.com/track/light www.epic-mountain.com Our Patreon: https://www.patreon.com/Kurzgesagt?ty=h Visit us on reddit/facebook/twitter. You know. Social media stuff. https://www.reddit.com/r/kurzgesagt http://kurzgesagt.org https://www.facebook.com/Kurzgesagt https://twitter.com/Kurz_Gesagt THANKS A LOT TO OUR LOVELY PATRONS FOR SUPPORTING US: Phiroze Dalal, T0T0S, Ryan OHoro, Kay Brinkmann, A La Mode, Marcelo Fernandes de Souza Filho, Vince, Thomas Shiels, Tom Wardrop, Shawn Marincas, Pontus Attåsen, Paul, Horacio Medina, Jim Yang, Arnav Guleria, Clemens, Robert McKone, Tahseen Mushtaque, Todd Binkley, Jochen, Vahur S, Matthew von der Ahe, Thomas Russell, Erick, Vivek Kotecha, Nils Caspar, Holger Fassel, Artur Szczypta, Jeff Fellows, Daniel Duffee, Konstantin Shabashov, Jackson R Hanna, Tim drake, Pascal de Reuck, Mike Galles, ByeongWook Lee, Guus Ketelings, Franko Papić, Thalia, Narat Suchartsunthorn, Lorenz Zahn, Brian Aparicio, Jörg Vogelsang, Rashed Ali, Darwin Ranzone, Tyler Thornton, Bernat Unanue, David Pfister, Ash Patel, Han Saini, Ute Moll, Vrm Vee Are Em, Ioanna Bischinioti, Jenny Zhou, Vince Babbra, Dan Cortes, Matt K What is light? Help us caption & translate this video! http://www.youtube.com/timedtext_cs_panel?c=UCsXVk37bltHxD1rDPwtNM8Q&tab=2
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Текстовые комментарии (5847)
JohnBee (7 часов назад)
Everyday I wake up and thank evolution for that smart move ....
Venkatesh babu (3 дня назад)
Light is the massless energy transmitter of the cosmos. Approximately 8% flows in the cosmos. They are some kind of catalyst in a chemical reaction. They are never lost or gained. But they do miracles like splitting atoms chemical reaction etc. They are never trapped but help in switching states of matter etc. Other forms of energy are positional dependency of matter. They help in triggering huge movements including spin depending on intensity. They cannot be captured but can be bent split or merged.
Venkatesh babu (3 дня назад)
They can move even black holes.
Literally God (4 дня назад)
c is actually 300K Km/s not 300K m/s.
Spider Ham (5 дней назад)
What is light? Baby don’t *Hertz* me, no more...
Never Give Up (5 дней назад)
I thing this is wrong choice for learning engilsh
hari_kishore (7 дней назад)
0:28 photons can't be destroyed if it is energy. It can only transformed to other form.
Harsh Wadhawe (8 дней назад)
Can you make a video on matter waves
Yosafat Theo (8 дней назад)
I'm at highschool now and one of the subject that I learnt in school was talking about the wave particle duality in light, so why did you say it's a lie? I'm hoping that you can answer my question and I will appreciate it. Thanks!
UserName0043 (9 дней назад)
light is gay
CRYSTAL L ADAMS (9 дней назад)
Spaaace
Jean Q Loveday (12 дней назад)
Not too fast sunnyboy, “Duality of light means light can behave like a particle OR a wave but never both at the same time, this distinction is crucial
Jean Q Loveday (11 дней назад)
​+ofek10 Dude ok you win, just so you know I never raised issues with it's label and properties nor asked for a summary of Physics 1.01 aint this an emphasis on behaviours of light sorry "photon"
Jean Q Loveday (11 дней назад)
ofek10 ppff we don’t see things as they are, we see things as we are. I’m no expert but this is light duality is fundamental, King Crocaduck explains this better than me
ofek10 (11 дней назад)
What? What does that even mean? Light "particles" are always waves...
Mikael Heinken (12 дней назад)
hi...
Jamie Spencer (13 дней назад)
this is such a dum video
Daniel Caoili (13 дней назад)
I still dont get it. Bad explanation. Why is light represented by squiggling worms? How is that supposed to work? How can a 3d field be perpendicular to another 3d field this makes no sense.
Havasi Bence (14 дней назад)
I got an interesing question! You see a star 10 lightyear away. The light need to come to here from the star 10year but you see that star instantly. How does it work?
ofek10 (11 дней назад)
You don't see the star instantly. If it dies right now you'll see it only in 10 years.
NBK Srbija (13 дней назад)
The light that you see left the star 10 years ago, so when you look at the star, that light arrives to your eye. It's similar to rain: the raindrops condensed in the clouds half an hour ago, but when you go out and it's raining you don't need to wait half an hour for the drops to fall on you, even if they've been falling for half an hour.
The Jackass Linguist (15 дней назад)
Clicked on the thumbnail because PRAISE HELIX
1:35 the bottom right "This image is a lie"
Timothy Howell (16 дней назад)
YOU ARE THE BEST 🍍🍍🍍🍍🍍🍍
Dany Lopez (17 дней назад)
Why eould 1.1k people dislike this
Chloé Alaïa (19 дней назад)
I'm sorry, but "light is... energy"... and "[energy] can be destroyed"??? Umm - unless you can demonstrate that zero point energy exists... (or are you subliminally suggesting it does??) - then energy can neither be created nor destroyed... only changed in form. It will convert from one form to another but will not be destroyed. 1st law of thermodynamics guys, srsly.
ofek10 (18 дней назад)
+Chloé Alaïa Exactly. Happy to help
Chloé Alaïa (18 дней назад)
+ofek10 sorry, last nuisance question 😳 So, essentially , the photon is the particle of light which can basically diminish (destroy) through absorption of a kind? Thanks for your help btw x
ofek10 (19 дней назад)
@+Chloé Alaïa There are a couple of concepts here that should be clarified. First of all, light's energy doesn't lie in the "wave-particle duality". Light, as a wave, can make particles move- which means it carries energy and momentum, like any other wave. When I mean light, I don't mean visible light but any part of the electromagnetic spectrum. For example, to create a current in an antenna, the electrons need energy which is provided by the radio waves. The energy in the radio waves is being transferred to moving the electrons. "Light the smallest quantity of energy that can can't be split, only created and destroyed" - This sentence is just wrong. What is correct to say that at a certain color, light has a minimal value of energy possible above "0", which is commonly referred to as "a photon". Because it is the minimal amount of energy, it can't be split, only created and destroyed. Is this clear? Because if not, please ask so I could explain in a better way (please specify what wasn't clear)
Chloé Alaïa (19 дней назад)
+ofek10 okay, so the l͟i͟g͟h͟t͟ can be destroyed - not it's 'energy'? (i.e. the wave/particle duality)? So, when you say light, do you mean the light that is visible? It's strange, because Steve starts the explanation by stating "light is the smallest quantity of energy [...] that can't be split, only created and destroyed" - hence my confusion as to how this claim of such energy can be created/destroyed.
ofek10 (19 дней назад)
Light can be destroyed by transferring its energy to a charged particle e.g. electron in an atom. No contradiction to conservation of energy. Light isn't energy, light has energy - just like a kid on a slide has energy.
acidtone (20 дней назад)
C=clock speed of the simulation
Oki 156 (20 дней назад)
*live Life*
Mauricio Casanova (23 дня назад)
0:35 *_NANI?_*
NeonLights (24 дня назад)
i have a fisics test tomorrow with this subject, thanks for the help
DYZ.G Comment (25 дней назад)
0:38 Smile, sweet, sister, sadistic, surprise, service. *cue the instrumental*
Soren O. (25 дней назад)
I just got a 1 hour and 45 minute ad on this wtf
Variety of Everything (26 дней назад)
Request: “What is humor?” Explain why we find things funny,p. :)
S H Y & L O N E L Y (28 дней назад)
Quantum's physics? Nice...
J G (28 дней назад)
This was a complete load of bollocks!
Doktor Mates (29 дней назад)
Maybe light is, what is our universe build on. I always think about big bang. They say matter exploded. That means light were spreading trough "nothingness" or diferent dimensions becouse it is way faster than matter. It appears to me that light is more real than our space wich has to have end, start, and time. Time couldnt start becouse it didnt exist before it started.
Kevin James (29 дней назад)
Hurts my eyes
Hakan ASLANGİRAY (29 дней назад)
Lütfen biraz daha yavaş anlatabilir misiniz Çok hızlı anlatım yapıyorsunuz hem yazıları takip etmekte zorlanıyoruz hem de grafikleri atlıyoruz
Cool Asf (1 месяц назад)
Baby dont hurt me
VWLZ (1 месяц назад)
What's so special about visible light? Absolutely nothing. *Apart from being able to be seen with the naked eye of the most intelligent being that had the largest influence on planet earth and probably the only beings to understand the universe so well.*
Primal ZA (1 месяц назад)
Light
Diogo Marques (1 месяц назад)
Baby don't hurt me Don't hurt me No more
pandit Sharma (1 месяц назад)
Nice work sir
mnx (1 месяц назад)
maybe thats just not happen, its planned.
Fahmid Rahman (1 месяц назад)
This is an amazing video which defo shed LIGHT on the MATTER
TheGolfdaily (1 месяц назад)
This is an excellent educational video.
Uddeshya Jaiswal (1 месяц назад)
A question- if light has no mass, how does it gets pulled by gravity? (light can't escape black holes right?)
ofek10 (18 дней назад)
+Uddeshya Jaiswal You're welcome :)
Uddeshya Jaiswal (18 дней назад)
+ofek10 oooh that's new to me... thnx for replying btw :)
ofek10 (19 дней назад)
Gravity affects everything that has energy, not just mass.
MrB8 (1 месяц назад)
What iş light baby dont hurt me dont hurt me no more
JoeShit TheRagMan (1 месяц назад)
Do "What is love?" next
Micha Grill (1 месяц назад)
But what *is* light? *_Vsauce music starts playing_*
DoubledEdgeSword321 (1 месяц назад)
MC LITE
Jake Watson (1 месяц назад)
This video helped me get a good grade.
Michael Wheelhouse (1 месяц назад)
Light is not propelled!
A Guy (1 месяц назад)
What do mean it is a lie? Hey! HEY!
Sounak Samanta (1 месяц назад)
please make a video on ELECREOMAGNETIC WAVES
Baby Alive Time (1 месяц назад)
*c* *co* *coo* *cook* *cooki* *cookie* *cooki* *cook* *coo* *co* *c*
K U (1 месяц назад)
A torch
Merrick Adams (1 месяц назад)
This is a reply
Merrick Adams (1 месяц назад)
This is another, another reply.
Merrick Adams (1 месяц назад)
This is yet another reply
Merrick Adams (1 месяц назад)
This is another reply
Merrick Adams (1 месяц назад)
Can you make a video on Fraunhofer Lines? Specifically how far away they can be used.
Christian Deblois (1 месяц назад)
WHAT IS LIGHT? BABY DONT HURT ME. DONT HURT ME.
YEE VIBAR (1 месяц назад)
I want my own bird,but where do I get one?
Pwnership (1 месяц назад)
Who else already knew this off heart from watching rick and morty?
MrTroller4Ever (1 месяц назад)
baby don't hurt me
mrphotomoto (1 месяц назад)
And this all came from evolution?! Stop believing the lie! The parameters for life are simply too narrow to allow for ZERO error. No amount of time would allow for so many accidents to occurre. Let alone the time taken into account for trial and error. I'm sorry, but the delicious apple I'm about to eat, is in NO way, related to my Mom, or a dog, or a ball of snot, or anything else. You can't accept anything else because that would allow for a possibility of Intelligent Design. Aka GOD. Stop being ignorant and look around you. What you see and experience was created and designed to be, and function, like a we'll oiled NASCAR. Exact precision doesn't just happen by accident. That's like seeing a painting in the museum, and forgetting that a person had made it. The picture didn't create itself, we agree on that, yes? But why not the existence of a Creator of our own earth?
Darwin Fesico (1 месяц назад)
How fast will the higher or lower frequency can travel?
BAbby Rajput (1 месяц назад)
what is lightning plz give me answer
bebah AS (1 месяц назад)
Thank you so so so so so so much
Nourii (1 месяц назад)
indonesian caption thanks :D
George Missailidis (1 месяц назад)
When someone tells me what light is, i will say *_Light is the connection between us and universe._*
T-series Big gai (1 месяц назад)
What is light baby don’t hurt me
Guilherme Gonçalves (1 месяц назад)
Light Yagami
Melanie Maritz (1 месяц назад)
Where's the video about the twin paradox?
The Harbinger Of Death (1 месяц назад)
We know that the closer you get to light speed the less time goes by (in your perspective)and the more time goes by (in other people’s perspectives.) so AT light speed no time passes at all (in your perspective) and any amount of time may pass (in other people’s perspectives.)
Sudarshan Haldar (1 месяц назад)
*in a test* Q3. Why does light travel so fast? Ans. let's change the question to what is 2 + 2. it is 4. 2:59 10/10
Jaf IO Tutorials (1 месяц назад)
WOW WERE NOT ALL GOING TO DIE A VERY SLOW HORRIBLE DEATH and then find out our lives were worthless anyway. This is the first video...
MOHAMADXD meme expert (2 месяца назад)
Lamp don't hurt me
Baby don’t hurt me, don’t hurt me no more.
UNCLE ALBERT (2 месяца назад)
light is a form of energy
Drake Brewster (2 месяца назад)
At time 2:45, E x B does not equal the direction of the wave propagation. This wave is animated traveling in the wrong direction. Can someone check my logic?
ofek10 (1 месяц назад)
Correct
Iakov Zhitomirskiy / Ladingru (2 месяца назад)
4:11 ...making us C things... XD
Rokkiteer (2 месяца назад)
If a light particle's mass is zero, does it exist?... *Insert image of that pondering velociraptor*
Iakov Zhitomirskiy / Ladingru (2 месяца назад)
If the mass of a particle is zero, it just doesn't interact with higgs boson
Lukas Mihara (2 месяца назад)
If things that have a mass >0 can't reach lightspeed, and photons that have no mass are traveling at light speed, could something that has a negative mass then maybe reach higher speeds than that? Just a random thought...
Iakov Zhitomirskiy / Ladingru (2 месяца назад)
in the theory, things with negative mass travel with speed higher than C and they can't also reach the speed C
just lyrics (2 месяца назад)
i was much affected by ad than video 😞
AntiScribe (2 месяца назад)
What is light? Baby don't hurt me...
Vijay Mishra (2 месяца назад)
Always best
Pc Master Wraith (2 месяца назад)
sounds like the voice used in the channel ahoy
Madian Antar (2 месяца назад)
2:45 wrong, there is a phase difference 3:10 wrong, Einstein took the speed of light as the fastest speed to travel through space because it is the fastest thing we can produce in the lab, once we can achieve higher speeds, the speed of light wont be the fastest to travel through space, this is one of the restraint relativity hypotheses
Ten Pound Sterling! (T£N!) (2 месяца назад)
Youtube sold out to phonies and autistic conmen.
Think different (2 месяца назад)
If light is massless then why it travels at a speed of 3×10^8 why not faster than that??
Sridhar G Reddy (2 месяца назад)
Very helpful dude!
Shouvik Mistry (2 месяца назад)
Light is kira
ThisIsFrog (2 месяца назад)
what is light? baby don't hurt me *please don't hurt me for writing this comment* no more
tim johansen (2 месяца назад)
Its the stuff that comes out of lamps.
CrazyCaptain (2 месяца назад)
3:41 'Our universe is just built this way' - Who built it then?
Sooraj Sharma (2 месяца назад)
We don't know, but what's the problem in not knowing?
Henry Jackson (2 месяца назад)
It really is possible to see outside of the "visible" spectrum...
Louise Lamperouge (2 месяца назад)
Court's ge zocked lol
suyash pawar (2 месяца назад)
But what if our eyes had been evolved to catch light from different wavelength?.....would we able to see something different than regular colors?....or is this just a dump question?
ofek10 (2 месяца назад)
You could see something different. Some stuff that look black will be "colored" IR, for example.
Koray YalÇın Kaya (2 месяца назад)
turkler like atsın yorumuma
kaizen jain (2 месяца назад)
cabbage
Koyote Mark (2 месяца назад)
BULLSHIT. LIGHT SPEED IS NOT CONSTANT., AND HAS BEEN SPEDUP IN A LAB, AS WELL AS SLOWING TO ONE MILE PER HR WITH HARDLY ANY ENERGY LOSS........LOOK IT UP
ofek10 (2 месяца назад)
You mean the group velocity in certain media, this video is talking about the speed of light in vacuum - why the overuse of caps lock?
Jarrett Clopton (2 месяца назад)
0:00 Read title
Alfonso Leon (2 месяца назад)
Does gravity affects two objects instantaneously? i mean faster than c?
ofek10 (2 месяца назад)
No
boimyboixd (2 месяца назад)
Is gamma speed. Faster then light?
boimyboixd (2 месяца назад)
oh
ofek10 (2 месяца назад)
Gamma radiation is the same as light, so it travels also at the same speed.
TheBlackestKey (3 месяца назад)
If anyone ever says "don't believe everything you read on the internet" this is what Ishow them.
hafiz_ridzuan harun (3 месяца назад)
Kurzgesagt: What is light Me: OMG YOU DON'T KNOW WHAT IS LIGHT OMG!!!!
Jin Kim (3 месяца назад)
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.

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