basic

Photoelectric Effect Threshold & KE Calculator

KE = hf − φ — kinetic energy of ejected photoelectrons.

Calculates maximum kinetic energy of emitted electrons, threshold frequency, and stopping potential in the photoelectric effect from photon frequency and work function.

Nadia Almasri By Nadia Almasri
Published Last reviewed 1 min read

Inputs

Results

Enter values and click Calculate to see results.
Was this helpful?

How to use this calculator

  1. Fill in the inputs above using the units you already have.
  2. Values update automatically as you type — no submit button needed.
  3. Hover any result row for the underlying formula and intermediate values.

Formula

KE_max = hf − φ; f_threshold = φ/h; V_stop = KE/e

In depth

Calculates maximum kinetic energy of emitted electrons, threshold frequency, and stopping potential in the photoelectric effect from photon frequency and work function.