Free De Broglie Wavelength Calculator
Calculate the de Broglie wavelength of a particle from its momentum: lambda = h / (m * v), where h is Planck's constant.
kg
m/s
De Broglie Wavelength
0.000000000727412 m
Wavelength (nm)0.727412 nm
Wavelength (pm)727.4124 pm
De Broglie Wavelength
Louis de Broglie proposed that all matter has wave-like properties, with a wavelength inversely proportional to momentum.
Formula
lambda = h / p = h / (m v)
This wavelength is measurable for electrons and neutrons, and is the basis of electron microscopy.
Example Calculation
Electron (m = 9.109e-31 kg) at v = 1e6 m/s.
- 01lambda = h / (m v)
- 02p = 9.109e-31 * 1e6 = 9.109e-25 kg m/s
- 03lambda = 6.626e-34 / 9.109e-25
- 04lambda = 7.274e-10 m = 0.727 nm
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