Work function (Φ)
Definition
Work function refers to the minimum amount of energy required for an electron to escape from the surface of a material and become free.
Analogy
Imagine trying to climb over a tall fence. The work function would represent the minimum amount of effort you need to exert in order to overcome gravity and get yourself over the top.
Related terms
Photoelectric Effect: A phenomenon where electrons are emitted from a material when it absorbs photons of sufficient energy.
Threshold Frequency: The minimum frequency of light required to cause the emission of electrons from a material in the photoelectric effect.
Kinetic Energy: The energy possessed by an object due to its motion.
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