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Red shift and blue shift in astronomy. Diagram of the Doppler effect, the change in the wavelength of radiation due to the motion of a source (galaxy Stock Photo - Alamy
Red-Shifting versus Blue-Shifting Hydrogen Bonds: Perspective from Ab Initio Valence Bond Theory | The Journal of Physical Chemistry A
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Have astronomers ever observed a violet shift like they have blue shifts and red shifts? | Science Questions with Surprising Answers
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