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when toggle format what by license comment
Feb 6, 2022 at 16:25 comment added anna v @rogerkoulitt correct.
Feb 6, 2022 at 15:54 comment added rogerkoulitt Thank you, I think I may have been confused there. I guess an atom travelling at some velocity sees itself at rest so the electronic excitation comes from the collision and not from having some KE?
Feb 6, 2022 at 6:11 history answered anna v CC BY-SA 4.0