Are photons affected by gravity

While it is true that photons have no mass, it is also true that we see light bend around sources with high mass due to gravity. This is not because the mass pulls on the photons directly, but instead because the mass warps the space-time through which the photons travel.

Imagine a bowling ball on a mattress. The ball is a massive object — say, the Sun — and the mattress represents space-time, in which it sits. (Of course, space-time is four-dimensional, but it’s a bit harder to imagine that!) When you place the bowling ball on the mattress, it deforms the surface.

If a grid were drawn on the mattress, you would see the grid deform, so the straight lines of the boxes were no longer straight.

Does light have mass

Does gravity affect time

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How is light affected by gravity if it has no mass

What is not affected by gravity

The same is true for a star sitting in space-time — the star deforms space-time around it, causing it to curve toward the star.

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according to general relativity how is light affected by gravity