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Formula Photoelectric effect (cutoff frequency, work function)

Formula
Formula: Photoelectric effect (cutoff frequency, work function)

Cutoff frequency

Unit
Cutoff frequency is the minimum frequency that light must have in order to be able to knock electrons out of a material.

Work function

Unit
Work function is the energy that must be absorbed to eject an electron from a solid (e.g. from a metal plate). As a rule, the work function is given in the unit "eV" (electron volt):$$ 1 \, \mathrm{eV} = 1.6 \cdot 10^{-19} \, \mathrm{J} $$

Planck's constant

Unit
Planck's constant is a natural constant that appears in the equations when the phenomenon under consideration exhibits quantum mechanical behavior. The Planck's constant has the value: $$ h ~=~ 6.626 \cdot 10^{-34} \, \mathrm{Js} $$