# Gravity effect on light

So light has momentum: $\vec p_{light}$

If Universal Gravitation tells us: $\vec F = \frac{Gm_1m_2}{r^2}$

How do we get the force on light from the more massive object?........ How do we know how much light will be shifted?

DaveC426913
Gold Member
Looking up gravitational lensing should give you some of the answers you seek.

We don't talk about the force of gravity - that's Classical Newtonian - we talk about the curvature of spacetime.

Looking up gravitational lensing should give you some of the answers you seek.
Okay thanks