How Does Light Actually Work?

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If you like this video, check out writer Geraint Lewis´ excellent book, co-written with Chris Ferrie:
Where Did the Universe Come From? And Other Cosmic Questions: Our Universe, from the Quantum to the Cosmos

AND check out his YouTube channel:

Music from Silver Maple, Epidemic Sound and Artlist.

Stock footage from Storyblocks and Artgrid, images of galaxies from NASA and ESO/Hubble.

00:00 Introduction
05:18 What Is Light?
12:58 An Invisible World
21:11 An Impossible Particle
30:54 Both And Neither
46:52 The Life of a Photon

#quantum #relativity

[leahime]

i’m still so amazed i get this for free while im sitting on the toilet. thank you.

[CallmeKenneth-tbzb]

I'll tell you what I think, I think this series is better than anything the BBC, Discovery, or anyone else on the internet is putting out right now. High quality coupled with a knack for making incredibly complex subjects easy to understand by the laymen. I also think the more we learn about Quantum Mechanics the more bonkers it gets.

[joshonemoore]

“The bizarre world of quantum mechanics never disappoints.” Neither do these videos. Thanks.

[parallelparkdaudette]

Thanks for actually educating us, instead of clickbaiting us like 99% of other space documentary channels.

[zactar]

opening story of a single photon being detected by a telescope was beautiful

[einfisch]

I've heard this sentiment commented here before, but I have an undergraduate degree in physics and yet these videos give me so much insight into these concepts I've learned. I have learned the formulas of relativity and those which govern photons and light on a classical scale and yet the way you present these concepts is incredibly illuminating and never fails to blow my mind, so thank you for producing such incredibly high quality educational content for free.

[jimmoore]

Thanks! As an 80 y/o graduate in Physics and life-time science nerd, I enjoy learning about discoveries that reveal the complexities of our wondrous universe with its two trillion galaxies. Viewing videos such as this is a mind expanding joy. Your explanation that a photon sees neither time nor distance in its journey has helped me finally accept quantum entanglement.

[mikenccc]

John Rendle below put it perfectly. This is stunningly well done. I first was taught physics at this level 51 years ago and this, is the single clearest, best written, most approachable / comprehensible documentary on quantum science & field theory that I have ever seen. How CAN this only have 0.5m views. BRILLIANT.

[undeathbysnipe]

as a Physics major in college, i understood many (if not all) of the concepts you talked about in the video/documentary(?), yet i still learned so much in this past hour.

in education, we learn all of these formulas and briefly cover the idea where they come from, but you covering the history, the historical figures, and the slow accumulation of collective knowledge taught me so much.

the beauty of science and math is what attracted me to pursue physics as a career, and this hour long experience reminded my burnt-out brain of my absolute love for these wonderous concepts!

[LairdPrydae]

This doesn't even begin to show the worth of this video as a scientific piece, and falls even further away from appreciating it's value as an entertainment piece. Well done on the masterful ability to put those two things together, and bring some semblance of beauty AND knowledge to millions that otherwise would not have experienced it. Well done and thank you, from all of us, somewhere in time.

[ryanbaker]

Hands down, the best science channel on YouTube. I grew up with Carl Sagan's/PBS' Cosmos series on both broadcast and then VHS. This channel and its series are the modern equivalent of that prior gem, and here they are in full modern resolution and quality and essentially made free for all. Amazing. Whoever the creative geniuses are behind this channel, thank you! 👏🙏

[Iveri.REP.]

pre-teen here. i discovered this video after getting inspired after watching the movie Oppenheimer, the process of the Manhattan Project. i’ve watched this a little over three times, wrote four papers about light and gave two to my science teacher which she is planning on hanging up in her class, and i am currently creating an entire journal to organize the information listed in this video, so whenever im bored with no internet, i can easily just pull out the journal and start reading. in addition, i’ve screen recorded this video so again, when i have no internet i can watch this video if i dont feel like reading. thank you for giving me and many others the opportunity to find something they are passionate about!

update : my teacher suggested i come up with something to show the class so im currently working on google slides to present voluntarily:)

[Brian]

This channel and your History of the Earth are putting out some of the best content on YouTube! I'm always blown away by your releases! Thank you for sharing your work and I'm looking forward to the next video!

[johnrendle]

This must be one of the most beautifully presented episodes in an almost poetic series. Incredibly produced and written with superb delivery. Wow!

[nik-btd]

Alright so I do like this series very much since the beginning, but this one litteraly blew my mind. I'm amazed at the extraordinary quality of both the script and the illustrations - you manage to give a grasp of the madness of quantum physics in an amazingly clear way. I feel smarter with each episode (then I realize I have even more questions, hehe). This is an absolute jewel of a production on Youtube, by far the best astrophysics material for laymen out there since Feynman's lectures ;) Outstanding work, can't wait for more.

[-AndAllThatJazz..]

To the team who produced this one : You have outdone yourselves this time.
In theory content, visuals and as usual . . the most compeling storytelling way of how to explain it .
General audience that lives and dies on the arena . . We salute you .

[MrEvers]

I love how this series is not only a history of the universe, but also a history of physics itself.

[melissachristensen]

I’ve been studying light and gravity for a while, and this is the most complete and succinct explanation of its mysteries I’ve come across

[natjonestower]

This is one of the most digestible bits of physics i've ever seen. Well done.

[brianmangan]

One of the best documentaries on light that helped me finally understand wave to particle.