If light has no mass, how does gravitational force bend light inwards

Question

In the case of black holes, lights are pulled into by great gravitational force exerted by the dying stars (which forms into a black hole). If light has no mass, how is light affected by gravity?

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Answer 1

Light is unaffected, at least that’s what Einstein postulated and we still do today. Light travels in a straight path, but what light sees as a straight line isn’t a straight line from a distance and this is how you derive in principle the Einstein relativity relations.