Why is light affected by gravity if it has no mass?
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Everyone says mass curves space time but no one says why. It’s because mass displaces the space time by occupying that area where space time was. Because of this space time is constantly trying to “reclaim” the spot that was displaced by mass. This is what causes gravity. Gravity is just space time trying to reclaim the area displaced by mass.
Because of this, light is bent too because light can only operate with space time.
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