Doppler effect: Quick Facts

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Photos and Videos

Diagram illustrating the Doppler shift in astronomy, showing how absorption lines in a color spectrum move toward violet for approaching objects and toward red for receding objects, with labeled comparison spectra.

Figure 2: Plot of intensity of gamma ray flux passing through absorber as function of Doppler velocity applied to source; dip in centre is caused by nuclear resonant absorption.

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Topics

Doppler frequency shift wave radiation wave motion vibration phase absorption loudness interference timbre sound intensity frequency

Key People

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Christian Doppler

Austrian physicist

Italian-born physicist Dr. Enrico Fermi draws a diagram at a blackboard with mathematical equations. circa 1950.

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Italian physicist Guglielmo Marconi at work in the wireless room of his yacht Electra, c. 1920.

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