6/5/2023 0 Comments Redshift spectrum![]() Other physical processes exist that can lead to a shift in the frequency of electromagnetic radiation, including scattering and optical effects however, the resulting changes are distinguishable from (astronomical) redshift and are not generally referred to as such (see section on physical optics and radiative transfer). Subtler redshifts are seen in the spectroscopic observations of astronomical objects, and are used in terrestrial technologies such as Doppler radar and radar guns. Gravitational waves, which also travel at the speed of light, are subject to the same redshift phenomena.Įxamples of strong redshifting are a gamma ray perceived as an X-ray, or initially visible light perceived as radio waves. Relativistic, gravitational, and cosmological redshifts can be understood under the umbrella of frame transformation laws. ![]() The observation that all sufficiently distant light sources show redshift for a velocity proportionate to their distance from Earth is known as Hubble's law.
0 Comments
Leave a Reply. |