- #1

myra2016

- 1

- 0

## Homework Statement

The metric is given by

https://dl.dropboxusercontent.com/u/86990331/metric12334.jpg

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*

## 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

## The Attempt at a Solution

I get the required

**t**but the sign is different.

**https://dl.dropboxusercontent.com/u/86990331/metricattemptatsolution.jpg**

Last edited by a moderator: