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General relativity considers gravity as the curvature of space-time instead of a force. Therefore, what is bent around an astronomical object is the space-time itself. The light just follows the path as regular.

In classical physics however, I think we would interpret gravitational lensing as the light's being pulled by a massive object (correct me if I am wrong). This implies some centripetal acceleration on light.

The question is does the frequency of light have any effect on the amount of bending in gravitational lensing? Is it possible to separate the light into its components by gravity, like a glass prism would do?

Xfce4
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  1. Resorting to classical physics would result in no bending of light as light as no mass.
  2. But as you pointed out distorted spacetime curvature results in light travelling a bent path which is gravitational lensing.
  3. Splitting light by gravity is called Rainbow gravity theory, which is highly controversial..

I think I can't say for sure whether Rainbow gravity theory is right. And hence cannot answer your question.

bitsabhi
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Do you know that any mass with the the velocity of earth would take the same orbit?

so since "mass" for light in the more classical approach ist E/c^2 different light has different mass but since all have speed c the same path.

trula
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