Einstein's photoelectric equation: Meaning and Definition of

Ein'stein's photoelec'tric equa"tion

Pronunciation: [key]
— Physics. Physics.
  1. the equation that relates the energy of a photoelectron to the difference between the product of the frequency of the incident radiation times Planck's constant and the energy needed to remove the photoelectron from the substance.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.