BY LETTER
Blue Shift
A decrease in the wavelength of the light that is emitted from an object that is moving toward the observer. This makes the object appear to be bluer than it actually is. Both red shift and blue shift are part of the Doppler Effect.
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Development Notes
Text by M. Alan Kazlev
Initially published on 08 October 2001.
Initially published on 08 October 2001.
