# A Light deviation and Schwarzschild metric

1. Jun 2, 2016

### e2m2a

How did Einstein compute the amount of light deviation due to the earth's gravitational field when the Schwarzschild metric was not known yet?

2. Jun 2, 2016

### Yukterez

He didn't get it right at the first try, in fact in his first calculations in 1908 he was off by a factor of 2. The correct result was obtained 1915 using the weak field approximation where all terms smaller than the order of 1/c³ were neglected, see http://home.fnal.gov/~syphers/Education/Notes/lightbend.pdf

Last edited: Jun 2, 2016
3. Jun 2, 2016

### e2m2a

ok. Thanks for the reference.

4. Jun 3, 2016

5. Jun 3, 2016