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when toggle format what by license comment
Jul 11, 2017 at 8:58 comment added Emilio Pisanty What about them? Some processes produce photons. Other processes don't. The ones that do we can see directly. The ones that don't we infer by other means.
Jul 11, 2017 at 8:10 comment added sangstar What about in cases like the inverse Compton effect, then?
Jul 11, 2017 at 7:29 history answered Emilio Pisanty CC BY-SA 3.0