redshift

== English == === Alternative forms === red shift === Etymology === From red +‎ shift. === Pronunciation === IPA(key): /ˈɹɛdˌʃɪft/ (enPR: rĕd'-shĭftˌ) Rhymes: -ɛdʃɪft Hyphenation: red‧shift === Noun === redshift (countable and uncountable, plural redshifts) (physics: astronomy, relativity) 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. Antonym: blueshift ==== Derived terms ==== ==== Translations ==== === Verb === redshift (third-person singular simple present redshifts, present participle redshifting, simple past and past participle redshifted) (physics: astronomy, relativity) (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. Antonym: blueshift ==== Derived terms ==== ==== Translations ==== === See also === Doppler effect