de Broglie Wavelength Formula
λ = h / p
What it means
Every moving particle has a wavelength inversely proportional to its momentum — a key idea in quantum mechanics.
Variables
| Symbol | Quantity | SI unit |
|---|---|---|
λ | wavelength | m |
h | Planck constant | J·s |
p | momentum | kg·m/s |
Worked example
Given h = 6.6260e-34 J·s, p = 1.0000e-24 kg·m/s, solve for λ:
λ = 6.6260e-10 m