What is thresold energy ? Write its SI units. Establish Einstein photoelectric
equation {mvmax =2(v-v.) relating to the photoelectron emission.
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The threshold energy for production of a particle is the minimum kinetic energy a pair of traveling particles must have when they collide. Activation energy is denoted by Ea. It is usually measured in joules (J) and or kilojoules per mole (kJ/mol) or kilocalories per mole (kcal/mol)
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