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akomtu
4y ago
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That's the model of photon, not the photon itself. A mathematical photon cannot decay. What prevents a photon from hitting a quantum bump on its way between galaxies and become an electron?
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cozzyd
4y ago
Indeed ultra high energy photons "decay" by interacting with the CMB.
ben_w
4y ago
Using the word “decay” to include that feels like it can’t be right.
But I’m not a proper physicist, just an amateur.
cozzyd
4y ago
Yeah, you're right, it's not the right word at all!
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