GlenCalc

Wavelength calculator

Speed = frequency × wavelength. Pick the kind of wave to use its speed.

Your answer

Wavelength2.9979 m
Period1.000 × 10⁻⁸ s
Photon energy4.136 × 10⁻⁷ eV

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How we worked it out

Updated as you change the numbers.

  1. λ = v ÷ f, f = v ÷ λ, period = 1 ÷ f.

Method and assumptions

The speed of light in a vacuum is exactly 299,792,458 m/s. Sound speeds are typical values and change with temperature.

Questions

What is the wavelength of a 100 MHz FM radio signal?

2.998 m, just under 10 feet.

Sources

Method and figures checked on . Every worked answer on this page is covered by an automated test. Found a mistake? Tell us.

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