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Results for “Doppler effect”
Space & Astronomy
Blueshift
Blueshift is the shortening of electromagnetic wavelengths—an increase in frequency and energy—observed when a light source moves toward an observer or when space itself contracts.
ScienceDoppler Effect
The Doppler effect is the change in frequency or wavelength of a wave due to relative motion between the source and observer, first described by physicist Christian Doppler in 1842.