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 Shift Definition, Types & Uses - Video & Lesson Transcript | Study.com
Red Shift/Blue Shift The Doppler Effect with Light - ppt video online download
Doppler Shift
Astronomy - Ch. 5: Light & E&M Radiation (27 of 30) Red Shift and Blue Shift Explained - YouTube