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blueshift noun

  /ˈbluːˌʃɪft/
  • (physics, :, astronomy, relativity) A decrease in the wavelength of a photon or of light, corresponding to a higher frequency and a shift toward the blue end of the electromagnetic spectrum.
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blueshift verb

  /ˈbluːˌʃɪft/
  • (physics, :, astronomy, relativity) (ergative) (said of light or a photon) To shift toward the blue end of the electromagnetic spectrum; to change to a shorter wavelength and a higher frequency.
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