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Answer to Question #19116 in Astronomy | Astrophysics for Steve Samet

Question #19116
If photons have zero mass, why are they subject to the gravitational force?
Expert's answer
According to Eistein's General Relativity, gravtitation force is generated and is acting not on mass, but on energy.Energy and mass are equivalent for gravitation and they are related with famous formula

E=mc^2

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