Wavelength of FM radio at 100 MHz

Answer: wavelength = 2.997925 m (wavelength 299.7925 cm).

What we know

  • Wave speed: 299792458 m/s
  • Frequency: 100 MHz = 100000000 Hz (converted to the unit the formula takes)

Step by step

Given
v = 299792458 m/s, f = 100000000 Hz
Formula
λ = v / f
Substitute
λ = 299792458 / 100000000
Result
λ = 2.997925 m

All results

Wavelength2.997925 m
Wavelength299.7925 cm

Open the wavelength calculator with these numbers → and change any of them.

The physics

Wavelength is the physical distance between wave crests: wave speed divided by frequency. For light and radio, speed is the speed of light (299,792,458 m/s); for sound in air it's about 343 m/s.

Speed of light in vacuum →