In SI system, unit of wavelength is meter. Any way meter is a large unit so we use Angstrom and some times nanometer. Angstrom (Ǻ) equals to 10 -10 m and nano metre equals to 10-9 m. The range of wavelength for visible light is from 3700 Ǻ to 7200 Ǻ.
For visible light, the wavelength will usually be specified in nm (nanometers).
metre
The wavelength of a wave is the distance from the crest to the next crest of a wave, usually measured in metres. A wavelength is not a unit.
Nanometres. mX10^-9
The unit of measuring wavelength of light is typically in nanometers (nm). One nanometer is equal to one billionth of a meter, making it a convenient unit for measuring the very small wavelengths of light.
The unit of wavelength is a Hertz, written as Hz.
Wavelength is a length. The SI unit for length is the meter (m).
Wave speed = (frequency) x (wavelength) = (238 x 9) =2,142 (same length unit as the wavelength) per second.
Above a wave's wavelength is its frequency, which represents the number of wave cycles that pass a fixed point in a unit of time. Frequency and wavelength are inversely proportional in that as wavelength decreases, frequency increases, and vice versa.
"Wavelength" is described in any convenient unit of length or distance, such as meter, foot, inch, furlong, kilometer, Angstrom, smoot, light-year, etc.
Wavelength is a length. Hence, the metric unit for it is "meter". Frequency is a reciprocal of time. Hence, the unit for it is "per second", named "Hertz".
Wavelength is a length. As such, any unit of length is suitable as a description of wavelength. The SI unit of length is the meter. Along with its multiples and sub-multiples, the meter is a dandy unit of wavelength.