General Relativity: Top 05 Mishaps [inc INTERSTELLAR]


From Standup Mathematician.

Check out A Podcast of Unnecessary Detail:

This is the Maths Inspiration show I’m going with Eugénie on 24 November:

We have passes for schools as well as for people watching from home.

Huge thanks to Eugénie von Tunzelmann for being my coolest friend and for taking the time to chat with me for this video. Check out all the films she has worked on!

Gravitational Lensing by Spinning Black Holes in Astrophysics, and in the Movie Interstellar

Read the free book "Reflections on Relativity" by Kevin Brown

This is an archive of their old post about the time dilatiopause. Complete with retro ASCII equations.!original/sci.physics/2VrFGgiVPi8/F4KK_9MWrlMJ

Thanks to Cleon Teunissen for emailing in with a bunch of useful details.

And they recommend this book chapter for more on why the shape of the Earth is an isochrone:

Speed dilation equation:

Gravity dilation equation:

– Yes, the diagram of the photon clock on the train has a light path of over 45° from the vertical which means the train is going faster than the speed of light. Let’s just agree the train (and everything within it) is not to scale!
– Let me know if you spot any more mistakes!

Thanks to my Patreons who mean I can film hours of myself talking about relativity and then ask Alex to ‘edit that into something which makes sense’. Here is a random subset of those fine Patreon People:

Markus Herrmann
Chris Connett
Elaine Hewitson
Neil McGovern
Paul LeVan
Claire Greenhalgh
Erin Eldridge
Loren Thomas
Patrick Stover
Glenn Watson

As always: thanks to Jane Street who support my channel. They’re amazing.

Filming and editing by Alex Genn-Bash
Animations by William Marler
Music by Howard Carter
Design by Simon Wright and Adam Robinson

Clips from Interstellar (2014) are all copyright some combination of Paramount Pictures and Warner Bros. and I thought we could all agree my use here is pretty fair. But they have already put a copyright claim in on this video, so there’s that.

MATT PARKER: Stand-up Mathematician
US book:
UK book:

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