IUPAC - wavelength in medium (08299)

wavelength in medium symbol: $λ$ , units: $m$ , $μ m$ , $nm$

Synonym: wavelength

https://doi.org/10.1351/goldbook.08299

Distance travelled by a wave of electromagnetic radiation in one cycle in a non-absorbing medium of real refractive index

n

λ = λ_{0} / n

Notes:

In spectroscopy, the unqualified term 'wavelength' frequently means the vacuum wavelength, and symbol $λ$ frequently means $λ_{0}$ .
SI unit: $m$ . Common unit: $nm$ or $μ m$ .

Source:
PAC, 2021, 93, 647. (Glossary of methods and terms used in analytical spectroscopy (IUPAC Recommendations 2019)) on page 678 [Terms] [Paper]

Citation: 'wavelength in medium' in IUPAC Compendium of Chemical Terminology, 5th ed. International Union of Pure and Applied Chemistry; 2025. Online version 5.0.0, 2025. https://doi.org/10.1351/goldbook.08299 RIS BibTex EndNote

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Version 3.0.1 (6776 Terms)

wavelength in medium symbol: $λ$ , units: $m$ , $μ m$ , $nm$

Alphabetical Index

Additional Indexes

Version 3.0.1 (6776 Terms)

wavelength in medium symbol: λ, units: m, μμm, nm

wavelength in medium symbol: $λ$ , units: $m$ , $μ m$ , $nm$