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Find Null Geodesics with affine parameter

  • #1
1
0

Homework Statement


The metric is given by
https://dl.dropboxusercontent.com/u/86990331/metric12334.jpg [Broken]
H is constant; s is an affine parameter, and so r(0)=t(0)=0.

Apologise in advance because I'm not very good with LaTex. So I used Word for equations, and upload handwritten attempt at solution :smile:

Homework Equations


Need to show that the null geodesics from r=0, t=0 are given by
https://dl.dropboxusercontent.com/u/86990331/metricquestion.jpg [Broken]

The Attempt at a Solution


I get the required t but the sign is different.
https://dl.dropboxusercontent.com/u/86990331/metricattemptatsolution.jpg [Broken]
 
Last edited by a moderator:

Answers and Replies

  • #2
18,077
7,496
Thanks for the post! This is an automated courtesy bump. Sorry you aren't generating responses at the moment. Do you have any further information, come to any new conclusions or is it possible to reword the post?
 
  • #3
Hello, please attempt to re-upload the images, currently the links appear to be broken and may very well be the reason no one can help.
 

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