Richardson equation
/ˈrɪtʃəds(ə)n ɪˌkweɪʒn/(also Richardson's equation) Physics
noun
An equation for the maximum current density of electrons emitted from a hot metal surface in terms of the temperature and work function of the surface.
- Originally formulated by Richardson 1903 (Philos. Trans. (Royal Soc.) A. 201 497–549) in the form I = A 1 T ½exp(−b/T), where A is a constant, and b is the work function divided by Rydberg's constant R. He later amended it (O. W. Richardson Emission Electr. from Hot Bodies (1916) ii. 34) to I = A 2 T 2exp(−ϕ0/kT). The original formulation was amended by Saul Dushman, in consequence of which the equation is also called the Richardson–Dushman equation..
Origin
Early 20th century; earliest use found in The Physical Review. From the name of Sir Owen W. Richardson, English physicist + equation.
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