# B How would I calculate how much light is being bent in a certain area?

1. Jan 18, 2017

### Verideth

Hey guys, I'm trying to teach myself physics and ran into a problem. I've recently been trying to calculate how much light is being bent in a certain area. I think we'd have to use integrals? I came up with this little formula, but not sure if it's right. If anyone can help me, that'd be much appreciated!

$$L = \int_x^y MGc^{2} dx$$

How did I get this equation? First I thought how would I do this? I realized because we're calculating 2 points in the area of a wave, we'd have to use an integral. And then, I multiplied M (Mass of the object) by G (Gravitational constant) to signify that mass and gravity are involved. I then multiplied this by c^2 (speed of light, every second) because I decided that if we do this we'd get the speed of light by M and G. And of course, I then used dx. Thanks!

All help is appreciated! (Please remember, I'm new to astrophysics)

2. Jan 18, 2017

### Kai Spackman

Have you tried working out the Index of Refraction? This might help!