Reference Terms
from Wikipedia, the free encyclopedia

Redshift

In physics and astronomy, redshift is an observed increase in the wavelength of electromagnetic radiation received by a detector compared to that emitted by the source.

For visible light, red is the color with the longest wavelength, so colors experiencing redshift shift towards the red part of the electromagnetic spectrum.

Note:   The above text is excerpted from the Wikipedia article "Redshift", which has been released under the GNU Free Documentation License.
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July 7, 2015

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