Physics
De Broglie Wavelength
Matter wavelength of a moving particle.
Formula
Formula
λ = hm v
Variables
| Symbol | Definition | Type & range | Units | Role |
|---|---|---|---|---|
| m | particle mass | m > 0 | kg | input |
| v | particle velocity | v ≠ 0 | m/s | input |
| h | Planck constant | 6.626×10⁻³⁴ | J·s | result |
| λ | wavelength | λ > 0 | m | result |
Try it yourself
Interactive calculator
Worked examples
Example 1
Givenmass (kg) = 9.109e-31, velocity (m/s) = 1000000
Result7.274201504e-10
Example 2
Givenmass (kg) = 0.145, velocity (m/s) = 40
Result1.142425888e-34