How to use the de broglie wavelength calculator
Find the matter wavelength of a moving particle. Enter mass, speed in the fields above; the wavelength is computed instantly and plotted on the chart so you can see how the answer changes.
Formula
Variables
- m — Mass (kg)
- v — Speed (m/s)
Worked example
With mass = 9.109e-31 kg, speed = 1e6 m/s, the calculator gives wavelength ≈ 0.7274202 nm.
Frequently asked questions
What is the formula for the de broglie wavelength calculation?
Wavelength (nm) = HPLANCK / (m × v) × 1e9. Here m is mass (kg), v is speed (m/s).
What inputs do I need for the de broglie wavelength calculator?
You need mass in kg, speed in m/s. Each field is pre-filled with a typical example so you can see how the result responds as you edit the numbers.
How do I use this calculator?
Type values into the input fields. Results and the chart update instantly. Use Reset to restore the example values, Copy results to paste them elsewhere, or Share to copy a link that preserves your inputs.
Is the result exact?
Calculations use standard formulas and double-precision arithmetic, then display about seven significant figures. Real-world measurements carry uncertainty, so treat results as estimates unless your inputs are exact.