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 · Event
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.

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.