Question about relativistic acceleration:

Originally posted by sonhouse
Yes, it is A (angle)= 4GM/C^2R.

Notice R is the radius but not R^2, which was a surprise. I saw this formula at the Smithsonian during an Einstein exhibit. I copied it down.

It comes from the Schwarzschild metric. The derivation is here:
http://en.wikipedia.org/wiki/Kepler_problem_in_general_relativity#Bending_of_light_by_gravity

Originally posted by DeepThought
It comes from the Schwarzschild metric. The derivation is here:
http://en.wikipedia.org/wiki/Kepler_problem_in_general_relativity#Bending_of_light_by_gravity

That piece covers a lot more than just gravitational lensing! I was surprised the anomalous precession of Mercury was discovered so far back, 1859.