What Is Red Shift?

Answer

A red shift refers to a move that occurs in the spectra of very distant galaxies and it often moves towards elongated wavelengths. These types of movements normally indicate that the world is getting bigger.
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Ask.com Answer for: what is red shift
red·shift
[red-shift]
NOUN [ASTRONOMY]
1.
a shift toward longer wavelengths of the spectral lines emitted by a celestial object that is caused by the object moving away from the earth.
Source: Dictionary.com
A Red Shift (redshift) is a shift to longer wavelengths of the spectrum by an astronomical object. It is so called because such a shift is towards the end of the spectrum that is red. A more scientific definition is that of a shift of the frequency of a photon to a longer wavelength and therefore lower energy.
In astronomy, red shift is a shift in the spectra of very distant galaxies toward longer wavelengths, towards the red end of the spectrum. It happens when light seen coming from an object is proportionally shifted to appear redder.
Redshift is the occurrence when light seen coming from an object that is moving away is proportionally augmented in wavelength, or altered to the red end of the spectrum. They are attributable to the Doppler Effect, familiar in the changes in the evident pitches of sirens as well as frequencies of the sound waves produced by speeding vehicles.
Redshift happens when radiation such as light is seen coming from an object is shifted to appear more red than you might expect because the object is moving away from the observer. Objects moving toward observers have the opposite effect and that is called blue shift. You can find more information here: http://en.wikipedia.org/wiki/Redshift
Red shift is the appearance that an object is redder than it would appear to a hypothetical observer both closer to it or at rest relative to it.
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