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A.T., I assume, then, that one photon with twice the frequency of another has twice the rest mass?

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- #26

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A.T., I assume, then, that one photon with twice the frequency of another has twice the rest mass?

- #27

Dale

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Twice zero is still zero so sure.

- #28

A.T.

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What DaleSpam said. Photons do not advance in propertime, so the projection of their dynamic mass onto the propertime dimension (= rest mass) is zero. Their dynamic mass entirely goes into the spatial dimensions (= momentum).A.T., I assume, then, that one photon with twice the frequency of another has twice the rest mass?

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As I'm learning about "propertime," I see that what I have been crudely thinking about in terms of "mass" (with quotation marks!) may simply be what trained relativity folks know as "propertime." It seems as if, for a given particle, mass and propertime have many characteristics in common.

Has anybody ever proved that a photon isn't just an electron moving along the x axis with almost no w component, and an electron isn't just a photon moving along the w axis with almost no x component?

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