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submitted 7 months ago by [email protected] to c/[email protected]

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[–] [email protected] 1 points 7 months ago* (last edited 7 months ago) (1 children)

So photons do have mass?

[–] [email protected] 3 points 7 months ago (1 children)

only as long as they exist

[–] [email protected] 1 points 7 months ago

Else they don't. We are talking quantum here.