I am new to forums so do not know reply options, so some quick points. Would like ref to guide on options.
Still do not follow at atomic level. I understand that all radiation/matter interaction involves at lowest level the interaction of a photon and an atom, and thus should be...
I am still confused at atomic level, i.e. viewing a photon hitting an atom, and atoms and heat.
My starting understanding from discussion is that if photon hits an atom some energy may go into atomic shell, but some must go into atomic motion, in order to conserve momentum.
-Is it only this...