Travel time of light in gravity field of sun.

1. Mar 27, 2012

iloveannaw

1. The problem statement, all variables and given/known data
Given the distance from the sun to earth xE, the distance from the sun to venus xV and the mass of the sun m calculate the time delay due to gravity in receiving a radio signal sent from earth to venus (and reflected back). Ignore the gravity fields of venus and earth. Venus lies directly between Earth and Sun!

2. Relevant equations

from lectures:

$t' = (1 + \frac{\Delta\phi}{c^{2}}) t$

$\Delta\phi = \frac{-Gm}{r}$

3. The attempt at a solution

proper time as recorded by distant observer =
$t_{0} = \frac{x_{E}-x_{V}}{c}$,
this is the time for a one way trip from Earth to Venus.

I think that the time delay is caused by the slowing of time due to change in grav. potential but I don't know how to calculate this.

This isn't homework just self study, thanks

Last edited: Mar 27, 2012