redshift
noun
- relative increase in wavelength of electromagnetic radiation in the emission spectrum of astronomical objects
Wiktionary
Pronunciation: /ˈɹɛdˌʃɪft/
noun
Etymology: From red + shift.
- An increase in the wavelength of a photon or of light, corresponding to a lower frequency and a shift toward the red end of the electromagnetic spectrum.
verb
Etymology: From red + shift.
- (ergative) (said of light or a photon) To shift toward the red end of the electromagnetic spectrum; to change to a longer wavelength and a lower frequency.