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physical phenomena > process > physical process > optical process > radiation modification > wavelength shift > cosmological redshift

cosmological redshift comparison table

Subject	has discoverer	has anomaly	has discovery date	has definition	has symbol	has value	has property	is a kind of
wavelength shift				The alteration in frequency of electromagnetic radiation				radiation modification
cosmological redshift	Slipher	A few galaxies show blueshifts, the most famous being Andromeda galaxy, but most show redshifts, due to the expansion of the universe.	1926	The redshift due to the expansion of the Universe. Contrary to popular belief, this is not a Doppler shift. Most galaxies move away from us, but this is not the cause of their redshifts. Instead, as a light wave travels through the fabric of space, the universe expands and the light wave gets stretched and therefore redshifted.	z	the cosmological redshift as observed is the ratio of the radius of the Universe at the present epoch to the radius of the Universe at the time the radiation left the distant object.	wavelength shift is directly proportional to distance	wavelength shift

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