wavelength
The distance between crests of a wave. The wavelength determines the nature of the various forms of radiant energy that comprise the electromagnetic spectrum. For electromagnetic waves, the wavelength in meters is computed by the speed of light divided by frequency (300,000,000/Hz). For sound waves, the wavelength is determined by 335/Hz. See optical bands.
Length of a Wave
The wavelength is the distance between crests. The higher the frequency, the shorter the wavelength.
Cellular/Wi-Fi/Bluetooth/Cordless Phones
Frequency Wavelength
Band Inches
Millimeters (approximate)
600 MHz 500 20"
1.8 GHz 167 6 1/2"
2.4 GHz 125 5"
5 GHz 60 2 1/2"
High 5G Bands
24 GHz 12.5 1/2"
27.5 GHz 11 7/16"
37 GHz 8 5/16"
47 GHz 6.3 1/4"
64 GHz 4.7 3/16"
71 GHz 4.2 1/8"
Visible Light in Nanometers
The wavelengths of light visible by humans is approximately from 400 to 750 nm.