9. Geodesics.

MIT 8.962 General Relativity, Spring 2020
Instructor: Scott Hughes

The kinematics of bodies in spacetime.  Free fall described by geodesics: trajectories that parallel transport their tangents through spacetime, and extremize the experienced proper time.  How symmetries of spacetime lead to quantities being conserved along geodesics; associated notions of 'energy' and 'angular momentum' for certain spacetimes.

License: Creative Commons BY-NC-SA

[lleozin]

14:10 has the best General Relativity joke I ever heard!

[TurtleTube]

Worth noting that many sources, rather than writing |g| write -g, to get an overall positive sign for the volume element after taking the determinant of the metric tensor. g here stands for det(g) of course, as used in the lecture.

[doranhuh]

How does Lie derivative get transformed into "leader riveted"?

[MrFischvogel]

I found a continuation as promised at 45:07 in lecture 19 at 17.00min, but I was hoping to see how a global, integral conservation law for the stress-energy-tensor could be stated. Is this somewhere in following lecture ? Did I miss it?

[dennykim]

Please, anyone can tell me how I can prove the integral form equation in 1:03:00 ?

[keshwarjit]

Thank you for the wonderful lectures.
Found a minor typo at 34:15 : Cristoffel symbol to be read as $ \Gamma^{\mu}_{\mu \alpha}$.

[LiamDirk-uv]

Finally an actually informing video, why isn’t this the first result!??

[MasterCivilEngineering]

Step by step video solutions of engineering questions