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Glossary term: Doppler Effect

Description: The Doppler effect is the change in detected wavelength (or frequency) of sound or light waves caused by the relative motion of the source toward or away from the observer. For speeds significantly less than the speed of light, the Doppler shift in wavelength (or frequency) is proportional to the relative speed of the source divided by the speed of the wave.

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Term and definition status: This term and its definition is still awaiting approval

The OAE Multilingual Glossary is a project of the IAU Office of Astronomy for Education (OAE) in collaboration with the IAU Office of Astronomy Outreach (OAO). The terms and definitions were chosen, written and reviewed by a collective effort from the OAE, the OAE Centers and Nodes, the OAE National Astronomy Education Coordinators (NAECs) and other volunteers. You can find a full list of credits here. All glossary terms and their definitions are released under a Creative Commons CC BY-4.0 license and should be credited to "IAU OAE".