The emission and absorption lines of a given atom occur at the exact same energies.

Name: The emission and absorption lines of a given atom occur at the exact same energies.
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This is known as the principle of detailed balancing, which states that the rate of absorption of a photon of a given energy must be exactly equal to the rate of emission of a photon of the same energy. Therefore, the emission and absorption lines of a given atom occur at the exact same energies.

The Emission and Absorption Lines of a Given Atom Occur