Why is light affected by gravity if it has no mass?
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Its tricky because its not gravity that’s affecting the light (photons) light travels through spacetime, and in that spacetime are also objects with crazy mass. When the light gets warped its not gravity its the shape of spacetime that the light is currently traveling on.
Check this out…imagine a bowling ball on a mattress, the mattress is spacetime, the bowling ball is, let’s say its the sun. Anything with mass will deform spacetime just like the bowling ball is deforming the mattress. Now take a marble that represents a photon (light) now roll it in a straight line, if the marble comes to close to the bowling ball the marble will start to curve because of the affect the bowling ball has on spacetime (the mattress) that same spacetime the light is traveling on…see what I’m saying? hopefully that helps..
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