alleryThe energy of the emitted photon equals the difference between the:
ATwo elements
BTwo states
CTwo nuclei
DTwo atoms
Answer & Solution
Correct answer: B. Two states
1. The electron starts in one stationary state and ends in another.
2. Energy must be conserved in the transition.
3. So the photon carries the difference between the two states.
_Source: syllabus Physics Part II, Chapter 12, Atoms._
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