IEVref:845-01-14ID:
Language:enStatus: Obsolete
Term: wavelength
Synonym1:
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Symbol: λ
Definition: distance in the direction of propagation of a periodic wave between two successive points at which the phase is the same

unit: m

NOTE 1: The wavelength in a medium is equal to the wavelength in vacuo divided by the refractive index of the medium. Unless otherwise stated, values of wavelength are generally those in air. The refractive index of standard air (for spectroscopy : t = 15 °C, p = 101 325 Ра) lies between 1.000 27 and 1.000 29 for visible radiations.

NOTE 2: λ = v/ν, where λ is the wavelength in a medium, v is the phase velocity in that medium, and ν the frequency.


Publication date:1987
Source
Replaces:
Internal notes:2014-10-02: <i>&lambda;</i> = <i>v</i>/<i>v</i>, where <i>&lambda;</i> is the wavelength in a medium, <i>v</i> is the phase velocity in that medium, and <i>v</i> the frequency
corrected to <i>&lambda;</i> = <i>v</i>/<i>&nu;</i>, where <i>&lambda;</i> is the wavelength in a medium, <i>v</i> is the phase velocity in that medium, and <i>&nu;</i> the frequency JGO
2016-01-12: In the notes, the dash replaced by a colon to avoid ambiguity with a minus sign. JGO
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