![]() The photons that strike the metal’s surface must have enough energy to overcome the attractive forces that bind the electrons to the nuclei in order for the photoelectric effect to occur. Threshold Energy for the Photoelectric Effect In 1921, Einstein was awarded the Nobel Prize for Physics for his work on the Photoelectric Effect. This phenomenon, as well as the quantum nature of light, were explained by Einstein. Wilhelm Ludwig Franz Hallwachs was the first to notice the photoelectric effect, which Heinrich Rudolf Hertz later confirmed. The emitted electron is known as photoelectron, and this phenomenon is commonly known as photoemission. When a metal is exposed to light, the photoelectric effect occurs, in which the metal emits electrons from its valence shell. The polarization of light is supported by this feature of photons. Its spin axis is perpendicular to the travel direction. In contrast to electrons, which have a spin of 1/2, a photon has a spin of one.A photon’s energy can be transferred when it interacts with other particles.A photon is incapable of decay on its own.During a photon-electron collision, the whole energy and momentum are conserved.When radiation is emitted or absorbed, photons can be generated or destroyed.Electric and magnetic fields have no effect on a photon.It has no effect on the radiation’s energy. The quantity of photons crossing an area per unit time increases as light intensity increases. ![]() Photons have the following basic properties: ISRO CS Syllabus for Scientist/Engineer Exam.ISRO CS Original Papers and Official Keys. ![]()
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