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Q & A: bending light and photon mass

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Most recent answer: 02/15/2016
Does the gravitational bending of light , eg. because of a black hole, constitute contrary evidence to photons being considered massless?
- Alasdair Thomson (age 82)
Beaconsfield, Buckinghsmshire. U.K.

No, on the contrary the bending fits perfectly with the picture of photons without any rest mass. They do, however, have inertial and gravitational mass, as we've discussed extensively. See

Mike W.

(published on 02/15/2016)

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