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Calcimator

De Broglie λ

λ = h / (mv) for non-relativistic momentum.

Inputs

Results

λ (m)

0.000000001455

λ (nm)1.454681
How to Use This Calculator
  1. Enter the particle mass in kg (electron = 9.109e-31 kg, proton = 1.673e-27 kg).
  2. Enter the particle velocity in m/s (must be significantly less than the speed of light for classical de Broglie).
  3. Review the calculated de Broglie wavelength in meters and nanometers.
  4. Compare wavelength to atomic scale (~0.1 nm) to assess whether wave behavior is significant.
  5. For relativistic particles, use the relativistic momentum p = gamma*m*v instead.
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