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Или станьте спонсором на YouTube: bit.ly/spasibo_vam
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Сегодня всем известно, что скорость света в вакууме является неизменной, а ее величина — максимальная скорость среди возможных во Вселенной. Но в течение истории она претерпела множество уточнений, пока в 20-м веке не перевернула всю физику вверх тормашками.
Именно об этом — об истории измерения скорости света — и о ее значении, как физическом, так и для физики в целом, мы сегодня и поговорим.

Автор оригинального материала: Артём Прохоров aka sly2m
d3.ru/user/sly2m/posts/

Скорость света на канале Побединского:
www.youtube.com/watch?v=TuEZgMf7rKI
Видео о Варп-драйве:
www.youtube.com/watch?v=-QnQk9Y0Ev4

Подписывайтесь на нас:
fb.me/thealphacentauri.net
bit.ly/TelegramAC
twitter.com/theACentauri

If a photon leaves the train station shortly after the Big Bang…

Tweet at us! @pbsspacetime
Facebook: facebook.com/pbsspacetime
Email us! pbsspacetime [at] gmail [dot] com
Comment on Reddit: www.reddit.com/r/pbsspacetime
Support us on Patreon! www.patreon.com/pbsspacetime

Help translate our videos! www.youtube.com/timedtext_cs_panel?tab=2

Поддержите мою работу на Patreon: www.patreon.com/melodysheep | Получить саундтрек: bit.ly/2HKl9fi | Как всё закончится? Этот эксперимент уводит нас в путешествие до конца времен, на триллионы лет в будущее, чтобы узнать, какой может быть в конечном итоге судьба нашей планеты и нашей вселенной.

Мы начинаем в 2019 году и путешествуем в геометрической прогрессии во времени, наблюдая за будущим Земли, смертью Солнца, концом всех звезд, распадом протонов, галактиками-зомби, возможными будущими цивилизациями, взрывающимися черными дырами, эффектами темной энергии, альтернативными вселенными и финальной судьбой космоса.

Это картина будущего нарисована современной наукой — картина, которая, несомненно, со временем будет развиваться, когда мы будем находить дополнительные подсказки о том, как будет развиваться наша история. Большая часть этих знаний появилась совсем недавно — и новые кусочки головоломки все еще ждут чтобы их нашли.

Для меня этот взгляд сверху на время дает глубокую перспективу — что мы живем в горячей вспышке Большого взрыва, идеального момента, чтобы погрузиться в зрелище и звуки вселенной в ее дни славы, прежде чем все это исчезнет. Хотя конец в любом случае наступит, у нас будет практически бесконечное время, если мы будем правильно играть в наши карты. Будущее может выглядеть мрачным, но у нас, как у вида, огромный потенциал.

Представлены голоса David Attenborough, Craig Childs, Brian Cox, Neil deGrasse Tyson, Michelle Thaller, Lawrence Krauss, Michio Kaku, Mike Rowe, Phil Plait, Janna Levin, Stephen Hawking, Sean Carroll, Alex Filippenko, and Martin Rees.

Большое спасибо Protocol Labs за поддержку этого создания: protocol.ai/

И моим сторонникам Patreon: Juan Benet, Kalexan, Laine Boswell, Holly, Dave

The Vsauce Holiday Box is here! Its full of exclusive Vsauce merch, cool science toys, and ALL Vsauce proceeds are donated to Alzheimer’s research!!! ORDER HERE: geekfuel.com/Vsauce

SOURCES AND EXTRAS:

my twitter: www.twitter.com/tweetsauce
my instagram: www.instagram.com/electricpants

Gabriel’s horn:

en.wikipedia.org/wiki/Gabriel's_Horn
blog.plover.com/math/gabriels-horn.html

Gabriel’s wedding cake:

oumathclub.wordpress.com/2015/01/25/gabriels-wedding-cake/
PDF: people.emich.edu/aross15/math121/misc/gabriels-horn-ma044.pdf

Supersolid PDF: people.emich.edu/aross15/math121/misc/love-1989-supersolids.pdf

Zeno’s supertask paradoxes:

en.wikipedia.org/wiki/Zeno's_paradoxes
math.dartmouth.edu/~matc/Readers/HowManyAngels/SpaceTimeMotion/STM.html
www.youtube.com/watch?v=u7Z9UnWOJNY

Staccato Zeno runner with no velocity/acceleration discontinuities: goo.gl/2mYdcT

General supertask reads:

personal.lse.ac.uk/robert49/ebooks/PhilSciAdventures/lecture25.html
plato.stanford.edu/entries/spacetime-supertasks/
mathpages.com/rr/s3-07/3-07.htm
math.dartmouth.edu/~matc/Readers/HowManyAngels/SpaceTimeMotion/STM.html
en.wikipedia.org/wiki/Supertask
www.vordenker.de/gunther_web/achill1.htm

Big book of collected supertask writing: books.google.co.uk/books?id=0AzP9WLLJLcC

From the award-winning team that brought you The Secret Life of Chaos comes a unique television event on the physics of gravity, featuring unexpected historical insights, cutting-edge science and exciting new experiments.

With the brilliant Professor Jim Al-Khalili as our host, we visit the LIGO lab in the USA where gravity waves were discovered and uncover the latest theories about our cosmos that have come from studying the most intense sources of gravity imaginable – black holes.

Elsewhere, Jim even uses Albert Einstein’s theories of special and general relativity to work out how the rate at which you age is affected by gravity and the speed at which you move about.

Content Provided By TVF International. Any Queries Please Contact Us at hello@littledotstudios.com

Subscribe to Spark for more amazing science, tech and engineering videos — goo.gl/LIrlur

Follow us on Facebook: www.facebook.com/SparkDocs/

Follow us on Instagram: www.instagram.com/spark_channel/?hl=undefined

#JimAl-Khalili #physics #gravity #universe #space #time #nature #science #technology #alberteintein #experiment #engineering #sciencedocumentary

UPDATE: I’m hearing reports of calendar apps crashing quite severely. Please only experiment on non-vital apps as you could hypothetically lose data stored in them! But apparently if the app crashes and restarts don’t fix it: a forced restart will.

Proceed with caution, at your own risk, and report any findings!

Buy a physical book from Waterstones! bit.ly/humblepi_waterstones

ebook on Amazon: www.amazon.com/s?k=humble pi
Audiobook on Audible: www.audible.co.uk/pd/Humble-Pi-Audiobook/0241375509

Huge thanks to Nick Day and Ken Taylor who emailed me about this bug. If you find anything out, or know someone who might know, email me: matt@standupmaths.com

If you want to read the part of my book about this, here it is. (Dont tell anyone I let you have it for free.)
www.dropbox.com/s/ccloc2ql091l1v5/HumblePi-calenduh.pdf?dl=0

This is the video of me talking about the Boeing 787 Dreamliner and the Los Angeles Air Traffic Control Route Center problems.
www.youtube.com/watch?v=HYgqvapH7ak

2^52 microseconds before 1 January 2001
www.wolframalpha.com/input/?i=2^52 microseconds before 1 January 2001
(yes, yes, it is technically off by a microsecond)

CFAbsoluteTime
Type used to represent a specific point in time relative to the absolute reference date of 1 Jan 2001 00:00:00 GMT
developer.apple.com/documentation/corefoundation/cfabsolutetime

Double-precision floating-point format on wikipedia.
en.wikipedia.org/wiki/Double-precision_floating-point_format

CORRECTIONS
— Nothing yet. Let me know if you spot anything!

Thanks to my Patreon supports who do support these videos and make them possible. Here is a random subset:

Toby ONeil
Nate Brown
Jordan Scales
Matthew Holland
Philippe von Bergen
Glenn Watson
Kevin Mannon
David Lake
Lucas Werkmeister
Jan Strohbeck

Support my channel and I can make more videos:
www.patreon.com/standupmaths

Filming and editing by Matt Parker
Music by Howard Carter
Design by Simon Wright

MATT PARKER: Stand-up Mathematician
Website: standupmaths.com/
US book: www.penguinrandomhouse.com/books/610964/humble-pi-by-matt-parker/
UK book: mathsgear.co.uk/products/5b9fa76f230ffa140094dc43
Nerdy maths toys: mathsgear.co.uk/

Download the podcast of my BBC Radio4 show, Domestic Science (Ep1) www.bbc.co.uk/programmes/p02pc9x6/episodes/downloads

In this video I start with how many 256×256 greyscale images are possible and work my way up to the maximum number of possible YouTube videos.

Original question on twitter:
twitter.com/dedwarmo/status/755799688759037953

Here is our radio show on the BBC radio player. Let me know if it does not work for you.
www.bbc.co.uk/programmes/b07lxqq8/episodes/player

Our Festival of the Spoken Nerd DVD and download:
shop.festivalofthespokennerd.com/

Galaxy M81 image credit: NASA/JPL-Caltech/ESA/Harvard-Smithsonian CfA

Music by Howard Carter
Design by Simon Wright

MATT PARKER: Stand-up Mathematician
Website: standupmaths.com/
Maths book: makeanddo4D.com/
Nerdy maths toys: mathsgear.co.uk/

Sundial time and clock time often do not agree — the equation of time allows us to correct sundial time to clock time. This video explains how to use the equation of time and a basic explanation of the issues involved.
The equation of time represents the relationship between our planets orbital geometry and time as displayed on a sundial.

On a bench in Tartu, Estonia, we welcome Paul (@cr3) along with art from Simon (@mushybees) to talk about our road trip, an abandoned submarine base, and, yes, the incident where Tom fell through ice into a frozen lake. Also, rainbow Comic Sans.

TOM: youtube.com/tomscottgo — MATT: youtube.com/MattGrayYes — PAUL: twitter.com/cr3

And thanks to our artist, Simon Coxall, twitter.com/mushybees!

Tom flew on a Zero-G flight with the European Space Agency for this week’s video on his channel. This is the behind the scenes.
MATT: YouTube.com/unnamedculprit | TOM: YouTube.com/TomScottGo

(And if youre from a space agency, do get in touch! www.tomscott.com/contact/ )

How Zero-G Planes Work
www.youtube.com/watch?v=FO_Ox_dH0M8

If youre a masters or PhD student from an ESA member state, and zero-g sounds like your thing, have a look at the Fly Your Thesis program: www.esa.int/Education/Fly_Your_Thesis — the 2017-18 submissions are closed, but that just gives you time to start planning for next year…