Formula: Photoelectric Effect Energy    Frequency   

Formula: Photoelectric Effect
Straight line in the energy-frequency diagram results in the photoelectric effect

Work function

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): $$ 1 \, \mathrm{eV} = 1.6 \cdot 10^{-19} \, \mathrm{J} $$

Cutoff frequency

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

Planck's Constant

Planck's constant \( h \) is a physical constant from quantum mechanics and has the following exact value: $$ h ~=~ 6.626 \, 070 \, 15 ~\cdot~ 10^{-34} \, \mathrm{Js} $$

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