alleryBy Bohr's third postulate, a transition to lower energy emits a:
APhoton
BProton
CNeutron
DElectron
Answer & Solution
Correct answer: A. Photon
1. The electron drops from one allowed orbit to another.
2. The lost energy has to be carried away.
3. A photon is emitted.
_Source: syllabus Physics Part II, Chapter 12, Atoms._
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