A gas-phase hydrogen atom absorbs a photon of visible light and then emits a photon of ultraviolet light. What may be concluded about its initial and final values of the principal quantum number n ?
A) Initially n=1 and finally n=2
B) Initially n=2 and finally n=1
C) Initially n=2 and finally n=4
D) This scenario is impossible because ultraviolet light is more energetic than visible light
E) More information is needed - right now nothing can be concluded about the initial and final principal quantum numbers
