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

A) absorb a photon of energy 10.2 eV.
B) emit a photon of energy 10.2 eV.
C) absorb a photon of energy 13.58 eV.
D) emit a photon of energy 13.58 eV.


A

Physics & Space Science

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