red shift (z) Lengthening of the wavelength of light or other electromagnetic radiation from a source, caused either by the source moving away (the Doppler effect) or by the expansion of the universe (cosmological red shifts). It is defined as the change in the wavelength of a particular spectral line, divided by the rest wavelength of that line. The Doppler effect results from motion through space; cosmological red shifts are caused by the expansion of space itself stretching the wavelengths of light travelling towards Earth.
More From encyclopedia.com
blue shift , blue shift In astronomy, an effect in which the lines in the spectrum of a celestial object are displaced towards the blue end of the spectrum. It re… Shift , shift / shift/ • v. move or cause to move from one place to another, esp. over a small distance: [tr.] I shift the weight back to the other leg | [in… Hubbles Law , Hubble's law, in astronomy, statement that the distances between galaxies (see galaxy) or clusters of galaxies are continuously increasing and that t… Red Panda , Ailurus fulgens Red ★★★ 1991 , red a colour at the end of the spectrum next to orange and opposite violet, as the colour of blood, fire, or rubies. As a liturgical colour, red is u… New Red Sandstone , New Red Sandstone Name given to the terrestrial red-bed deposits that overlie the Carboniferous. These deposits are of Permo-Triassic age.
About this article
All Sources -
Updated Aug 24 2016 About encyclopedia.com content Print Topic
You Might Also Like