Question

A hydrogen atom is in its ground state (ni = 1) when a photon impinges upon...

A hydrogen atom is in its ground state

(ni = 1)

when a photon impinges upon it.

The atom absorbs the photon, which has precisely the energy required to raise the atom to the

nf = 3

state.

(a)

What was the photon's energy (in eV)?

eV

(b)

Later, the atom returns to the ground state, emitting one or more photons in the process. Which of the following energies describes photons that might be emitted thus? (Select all that apply.)

10.2 eV 12.1 eV 1.89 eV 13.6 eV

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