Quantum redactiones paginae "Motus ad rubrum" differant

Aliqui motus ad robrum sunt exempla [[effectus Doppler|effectûs Doppler]], notiore in mutatione altitudinis vel frequentiae [[sonus (physica)|soni]] [[tramen|traminibus]], [[arcera|arceris]], aliisque vehiculis celeribus emissi. Motus ad rubrum fit quandocumque lumen ab observatore abit. Exemplum huius est motus ad rubrum [[cosmologia|cosmologicus]], quae ex expansione universi evenit. Lumina satis distantes (plus quam milliones [[annus luce mensus|annos luce mensos]]) motum ad rubrum monstrant, qui modo incrementi distantiae a Tellure respondet. Motus ad rubrum gravitationalis est effectus [[relativitas generalis|relativisticus]] qui in radiatione electromagnetica ex campis gravitationlibus movente observatur. Contra motum ad rubrum, decrementi longitudinis undae efficitur cum lumen ad observatorem aut radiatio electromagnetica in campum gravitationalem movet. Hoc ''motus ad caeruleum'' vel motus ad rubrum negativum appellatur.

 

A [[Relativitas specialis|special relativistic]] [[Redshift#Redshift formulae|redshift formula]] (and its classical approximation) can be used to calculate the redshift of a nearby object when [[Continuum spatio-temporale|spacetime]] is flat. However, in many contexts, such as [[Foramen nigrum|black holes]] and [[Immanis diruptio|Big Bang cosmology]], redshifts must be calculated using [[Relativitas generalis|general relativity]].<ref>See Misner, Thorne and Wheeler (1973) and Weinberg (1971) or any of the [//en.wikipedia.org/wiki/Physical_cosmology#Textbooks physical cosmology textbooks]</ref> Special relativistic, gravitational, and cosmological redshifts can be understood under the umbrella of frame transformation laws. There exist other physical processes that can lead to a shift in the frequency of electromagnetic radiation, including scattering and optical effects; however, the resulting changes are distinguishable from true redshift and are not generally referred to as such (see section on [[Redshift#Effects due to physical optics or radiative transfer|physical optics and radiative transfer]]).

[[Fasciculus:Redshift_blueshift.svg|thumb|Redshift and blueshift]]-->