Uploaded February 2016 | Updated September 2026, 1 week ago

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A lot of physicists talk about "information" and just assume you'll figure out what it means by context... probably because they don't actually understand it. Hopefully, this video will fix all that! We'll talk about how physical information fixes a few relativity problems as well as how it relates to entropy and digital information.
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VIDEO ANNOTATIONS

Why is Light the Fastest Thing?
youtu.be/Vmi_h5A8B2k

Why Does Entropy Even Matter?
youtu.be/qQhv3YhiJ98

The Uncertainty Principle:
youtu.be/skPI-BhohR8

Spacetime Diagrams:
youtu.be/c0NuaATdzDE

What the HECK is Light?!
youtu.be/m2-UJAEJzcc
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LINKS TO COMMENTS

Abhijit Ghogre - Expanding Universe:
youtube.com/watch?v=C9OGc-_hT0s&lc=z13bxhdqovynhtbne22xixlh4uuojdrm1

Przemyslaw Szymusik - Sky Motion:
youtube.com/watch?v=KAmmb-4Ov40&lc=z13bt3w4mlquxdef422ocbviuzafgphkj
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EXTRA INFO LINKS

Logrithmic Universe Image:
Pablo Carlos Budassi [Unmismoobjetivo]
commons.wikimedia.org/wiki/File:Observable_universe_logarithmic_illustration.png

Veritasium and Vsauce on Randomness:
youtu.be/sMb00lz-IfE
youtu.be/9rIy0xY99a0

Entropy:
en.wikipedia.org/wiki/Entropy_(statistical_thermodynamics)
en.wikipedia.org/wiki/Second_law_of_thermodynamics
en.wikipedia.org/wiki/History_of_entropy
en.wikipedia.org/wiki/Statistical_mechanics

Speed of Information:
en.wikipedia.org/wiki/Physical_information
en.wikipedia.org/wiki/Faster-than-light
en.wikipedia.org/wiki/Speed_of_light
http://math.ucr.edu/home/baez/physics/Relativity/SpeedOfLight/measure_c.html
en.wikipedia.org/wiki/Speed_of_gravity
en.wikipedia.org/wiki/R%C3%B8mer%27s_determination_of_the_speed_of_light
en.wikipedia.org/wiki/Christiaan_Huygens#Optics

Information Theory:
en.wikipedia.org/wiki/Information
en.wikipedia.org/wiki/Information_theory
en.wikipedia.org/wiki/History_of_information_theory
en.wikipedia.org/wiki/Entropy_in_thermodynamics_and_information_theory
en.wikipedia.org/wiki/Entropy_(information_theory)

1948 Paper(s) on Information:
en.wikipedia.org/wiki/A_Mathematical_Theory_of_Communication
ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=6773024
ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=6773067

Astronomy:
en.wikipedia.org/wiki/Betelgeuse
en.wikipedia.org/wiki/Andromeda_Galaxy
en.wikipedia.org/wiki/Great_Debate_(astronomy)

Star Chart by Dan Bruton
midnightkite.com

History of Photography:
en.wikipedia.org/wiki/History_of_photography
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IMAGE CREDITS

Logo designed by: Ben Sharef

Stock Photos and Clipart
- Wikimedia Commons commons.wikimedia.org/wiki/Main_Page
- Openclipart openclipart.org
- or I made them myself...

Logrithmic Universe Image:
Pablo Carlos Budassi [Unmismoobjetivo]
commons.wikimedia.org/wiki/File:Observable_universe_logarithmic_illustration.png

Morse Code Chart:
commons.wikimedia.org/wiki/File:International_Morse_code.png

Radio Tower:
commons.wikimedia.org/wiki/File:Maedayama_North_radio_tower_4.jpg

Visible Light Signals:
commons.wikimedia.org/wiki/File:Seaman_send_Morse_code_signals.jpg

Hubble Telescope:
commons.wikimedia.org/wiki/File:Hubble_01.jpg

Oldest Photograph:
commons.wikimedia.org/wiki/File:View_from_the_Window_at_Le_Gras,_Joseph_Nic%C3%A9phore_Ni%C3%A9pce.jpg

Sombrero Galaxy:
hubblesite.org/newscenter/archive/releases/2003/28/image/a

Green Lantern:
orig09.deviantart.net/c204/f/2014/281/a/1/dc_green_lantern_corps__willpower__by_arcentreaux-d824x92.png

Images of People:
commons.wikimedia.org/wiki/File:Ole_R%C3%B8mer_%28Coning_painting%29.jpg
commons.wikimedia.org/wiki/File:Christiaan_Huygens.jpg
commons.wikimedia.org/wiki/File:Lemaitre.jpg
commons.wikimedia.org/wiki/File:Clausius.jpg
commons.wikimedia.org/wiki/File:Boltzmann2.jpg
commons.wikimedia.org/wiki/File:Josiah_Willard_Gibbs_-from_MMS-.jpg
commons.wikimedia.org/wiki/File:J.J_Thomson.jpg
commons.wikimedia.org/wiki/File:Ernest_Rutherford_LOC.jpg