One quantity important in understanding this effect appears in the numerator of the exponentialof the RichardsonÂ–Dushman equation, and is equal to about one-half of the ionization energy of thefree atom.
One quantity important in understanding this effect appears in the numerator of the exponentialof the RichardsonÂ–Dushman equation, and is equal to about one-half of the ionization energy of thefree atom. One can place a collecting plate next to a device undergoing this effect to find the stoppingpotential. The maximum kinetic energy of a particle undergoing this effect does not depend on theincident (*) intensity. The minimum energy needed for this effect to occur is equal to Planck's constantmultiplied by the threshold frequency, which is equal to the work function. For 10 points, identify thiseffect discovered by Heinrich Hertz and studied by Albert Einstein, in which light liberates electrons from ametal to create a current.
One quantity important in understanding this effect appears in the numerator of the exponentialof the RichardsonÂ–Dushman equation, and is equal to about one-half of the ionization energy of thefree atom.
 photoelectric effect [do NOT accept "photovoltaic effect" or other wrong answers]