For 10 points, name this effect by which photons hitting a surface cause emission of electrons, the explanation of which won Einstein his Nobel Prize.
This phenomenon's namesake spectroscopy can be used to determine the binding energy of a material. This effect experiences no detectable time lag due to ambient radiation. The work function over Planck's constant equals the threshold frequency of this effect. The use of induction coils with spark gaps bombarded by ultraviolet light allowed [*] Heinrich Hertz to discover this effect. According to Lenard, the kinetic energy of the resulting particles is intensity-independent and varies with the wavelength of the incident radiation in this effect. For 10 points, name this effect by which photons hitting a surface cause emission of electrons, the explanation of which won Einstein his Nobel Prize.
This phenomenon's namesake spectroscopy can be used to determine the binding energy of a material.
{photoelectric} effect