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Jim Schwiegerling, PhD

Which of the following statements accurately describes the relationship between spontaneous emission and stimulated emission:

1. Spontaneous and stimulated emission are the same effect.
2. Spontaneous emission is initiated by a passing photon, whereas stimulated emission occurs as a natural decaying of the atom.
3. Stimulated emission is initiated by a passing photon, whereas spontaneous emission occurs as a natural decaying of the atom.
4. Stimulated emission is initiated by a chemical reaction, whereas spontaneous emission occurs with the absorption of photons from a flash lamp.

(Click on an answer to see if it is correct)