By Bohr's third postulate, an emitted photon's energy equals what?
AEnergy of the initial state alone
BEnergy of the final state alone
CDifference between the two state energies
DSum of the two state energies
Answer & Solution
Correct answer: C. Difference between the two state energies
The emitted photon carries h nu = Ei - Ef, the energy gap between initial and final states.
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