Match the description of a process with the corresponding diagram: Absorption of

Question

Match the description of a process with the corresponding diagram:

Absorption of a photon whose energy is E1-E0
("dark-line" spectrum) a.
Absorption from an excited state (this hardly ever happens in
dark-line spectrum absorption experiments at low temperatures,
because an excited state drops back to the ground state so quickly
that there is never a significant number of atoms in an excited
state capable of absorbing the photon) b.
Emission of a photon whose energy is E2-E0 c.
Emission of a photon whose energy is E3-E1 d.

Explanation / Answer

1. a 2.c 3.b 4.d

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