I'm confused how reflection and absorption of photons work. For example hydrogen absorbs 4 wavelengths of light, but then that energy is emitted once the electron falls back to its ground state. So does it reflect all other wavelengths and then emit the one it absorbed? Wouldn't that create white light since everything is either emitted or reflected? Also how can photons be converted to heat if absorbing the energy just excites the electron only to emit that same energy right after as another photon?
Are their specific wavelengths light absorbs to excite electrons and wavelengths that just vibrate the electron to create heat? Also how is light reflection and emission not combined to make everything appear white?