The Doppler effect is the shift in wavelength arising from the relative motion of an object and the observer. As the source moves away from the observer, the wavelengths increase and move toward the red end of the spectrum, causing redshift. If the object moves toward the observer, that is called blueshift.
verifiedCite
While every effort has been made to follow citation style rules, there may be some discrepancies.
Please refer to the appropriate style manual or other sources if you have any questions.
Select Citation Style