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Absorption Probability Coefficient Defined

Einstein represented the probability of an atom absorbing incident radiation and moving to a higher energy state with a coefficient proportional to the surrounding radiation density.

Albert Einstein in a 1912 portrait
Albert Einstein, 1912. Photograph by J. F. Langhans — public domain. Wikimedia Commons source.
Read the explainer →Year 1916BerlinPhysics

Absorption Probability Coefficient Defined

1916 · Berlin · Germany · Physics

Einstein represented the probability of an atom absorbing incident radiation and moving to a higher energy state with a coefficient proportional to the surrounding radiation density.