What is Photoelectric Emission?Definition of Photoelectric EmissionPhotoelectric emission is defined as the release of electrons from a metal surface when light hits it.Quantum Theory Light is made up of photons, and each photon’s energy depends on its frequency.Correlation formulaWhere E is the energy of the photon, h is Planck’s constant, and ν is the frequency of the light.The work function of a metal depends on its chemical makeup and physical structure, and it varies among metals. For examp