The energy of a photon needed to cause ejection of an

Last updated: 7/9/2022

The energy of a photon needed to cause ejection of an electron from a photoemissive metal is expressed as the sum of the binding energy of the electron plus the kinetic energy of the emitted electron. When photons of 4.00x107 m light strike a calcium metal surface, electrons are ejected with a kinetic energy of 6.26×10-20 J. a Calculate the binding energy of the calcium electrons. b The minimum frequency at which the photoelectric effect occurs for a metal is that for which the emitted electron has no kinetic energy. Calculate the minimum frequency required for the photoelectric effect to occur with calcium metal.