De Broglie Wavelength Calculator
Compute the de Broglie wavelength λ = h/(mv) for non-relativistic particles.
How to Use This Calculator
1
Enter particle mass
Provide the particle mass in kilograms (e.g., electron 9.11×10⁻³¹ kg).
2
Enter particle velocity
Use non-relativistic speeds (v ≪ c) for best accuracy.
3
Calculate λ
The result is shown in nanometers (nm).
Formula
λ = h / p = h / (mv)
Example: Electron m = 9.11×10⁻³¹ kg, v = 1×10⁶ m/s
p = 9.11×10⁻²⁵ kg·m/s → λ ≈ 7.27×10⁻¹⁰ m = 0.727 nm
About De Broglie Wavelength Calculator
The de Broglie relation connects a particle's momentum to its matter-wave wavelength, illustrating wave-particle duality for electrons, neutrons, and other massive particles.
Frequently Asked Questions
When is this formula valid?
For non-relativistic speeds (v much less than c). For relativistic speeds, use relativistic momentum.
What units are used?
Inputs are SI (kg, m/s). Output is shown in nanometers (nm).