Photoelectric Threshold Frequency

f_{t h r es h o l d} = \frac{ϕ}{h}

The minimum frequency of light required to eject electrons from a material. Below this frequency, no photoelectric effect occurs regardless of intensity.

Variables

f_{threshold}

Threshold frequency

\phi

Work function

Planck constant

J·s

Derivation

From photoelectric equation when kinetic energy equals zero.

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