Photoelectric Effect Calculator
KE_max = hf − φ, Vs = KE/e
How to Use This Calculator
1
Enter φ and λ
Provide work function in eV and light wavelength in nm.
2
Press Calculate
See photon energy, maximum kinetic energy, stopping potential, and λ₀.
Formula
KE_max = h f − φ, with f = c/λ
V_s = KE_max / e
λ₀ = hc / φ
About Photoelectric Effect Calculator
Applies Einstein's photoelectric equation for a given work function and wavelength to estimate emitted electron energies.
Frequently Asked Questions
What if KE is negative?
No emission occurs; we report KE = 0 and V_s = 0.
Units?
Inputs: eV and nm. Outputs: eV, V, nm.