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Why photons are massless?

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Anonymous

14y ago
Updated: 8/18/2019

This refers to their so-called "rest mass", and it is related to the fact that they move at the speed of light. Any object with a non-zero rest mass couldn't move at the speed of light - if it did, its actual mass (mass, considering its movement) would be infinite.

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Wiki User

13y ago

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