In Making a Transition from State $n = 1$ To State $n = 2$

Multiple Choice

In making a transition from state $n = 1$ to state $n = 2$ , the hydrogen atom must

A) emit a photon of energy $10.2 \mathrm { eV }$ .
B) absorb a photon of energy $13.58 \mathrm { eV }$ .
C) emit a photon of energy $13.58 \mathrm { eV }$ .
D) absorb a photon of energy $10.2 \mathrm { eV }$ .