Wavelength from Frequency
Wavelength from Frequency
For any wave, speed equals frequency times wavelength, so the wavelength follows directly — key to antennas and acoustics.
The wavelength is λ = c/f. where c is the wave speed and f the frequency.
Inputs
c := 3e8 m/s=3e+08 m/s
f := 100e6 Hz=1e+08 Hz
Divide wave speed by frequency.
lambda := c/f=3 m
Results
A 100 MHz FM signal has a 3 m wavelength, which sets the size of an efficient antenna (often a half or quarter of this).
Assumptions & limitations
- Wave speed for the medium.
- Single frequency.
- Non-dispersive medium.