14. The Geodesic Equation

MIT 8.286 The Early Universe, Fall 2013
Instructor: Alan Guth

In this lecture, the professor reviewed Robertson-Walker metric and talked about geodesic equation.

License: Creative Commons BY-NC-SA

[tomlyle]

I’ve followed this on-line class from lesson 1., and although I’m not nearly as intelligent as those sitting in this classroom (correcting Dr. Guth‘s blackboard derivation!), I find this knowledge for knowledge’s sake extended exercise one of the most interesting courses I’ve ever audited. Luckily I don’t have to do the homework! Kudos to Dr. Guth and MIT!

[theboombody]

I'm impressed with the students that notice errors in the stuff written on the blackboard.

[edwardgalliano]

The answer is obvious. We are in Euclidean space inside an elliptic plane. It's just light is red-shifted by elliptic gravity.

[Fritzbedeek]

if someone could tell the camera operator to zoom out a little to include the raised blackboard, please do. don't just follow the fellow around the room.

[ncheboris]

great job. pls prof could you give me the possible defintion of the four velocity

[jacobvandijk]

@ 32:59 Greetings from mr Christof(f)el to mr Ellen Gut(t) :-)

[ganeshtarone]

Hey, that's an awesome video, and kudos to your explanation skills, can you please give me a bullet list of steps to be taken right from input to output to find null geodesic around ( say black hole) ? help would be very much appreciated :)

[malvadin]

What does the "gij" stand for in the final geodesic equation?

[zooqanpawar]

where to learn from begininng. This is all too complex
really want to learn this

[jimikhan]

How to find the non zero metric components i.e g_00, g_11, ... Of any line element...if anyone know please help me

[chrisallen]

This seems like Classical Mechanics on steroids. The derivation of the euler lagrange equation seems heavily reminiscent to the derivation of the geodesic equation..