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Synonyms

red shift

Scientific  
  1. See under Doppler effect


red shift Cultural  
  1. In physics, the reddening of light sent out by an object that is moving away from an observer. (See Doppler effect.)


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The red shift that can be observed in light from distant galaxies suggests that the universe is expanding, and thus supports the Big Bang theory.

Example Sentences

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The red shift indicates a change in the electronic structure or optical properties of the material.

From Science Daily • May 3, 2024

All galaxies farther away than about 50×106 ly exhibit a red shift in their emitted light that is proportional to distance, with those farther and farther away having progressively greater red shifts.

From Textbooks • Aug. 12, 2015

The red shift of the intervening galaxy is always less than that of the one being lensed, and each image of the lensed galaxy has the same red shift.

From Textbooks • Aug. 12, 2015

Its value is determined by taking the slope of a graph of velocity versus distance, obtained from red shift measurements, such as shown in Figure 34.5.

From Textbooks • Aug. 12, 2015

The apparent recession of the galaxies, with the red shift interpreted through the Doppler effect, is not the only evidence for the Big Bang.

From "Cosmos" by Carl Sagan