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Verideth

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

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)