Noun
change in the apparent frequency of a wave as observer and source move toward or away from each other
Source: WordNetAny component of target velocity perpendicular to the line of sight cannot be determined by using the Doppler effect alone, but it can be determined by tracking the target's azimuth over time. Source: Internet
Doppler effect main Frequency shift is caused by motion that changes the number of wavelengths between the reflector and the radar. Source: Internet
Atoms traveling towards a laser light source perceive a doppler effect tuned to the absorption frequency of the target element. Source: Internet
Doppler effect of water flow around a swan main The Doppler effect (or the Doppler shift) is the change in frequency of a wave (or other periodic event) for an observer moving relative to its source. Source: Internet
Doppler A Doppler stethoscope is an electronic device that measures the Doppler effect of ultrasound waves reflected from organs within the body. Source: Internet
Doppler effect main Doppler effect, yellow (~575 nm wavelength) ball appears greenish (blueshift to ~565 nm wavelength) approaching observer, turns orange (redshift to ~585 nm wavelength) as it passes, and returns to yellow when motion stops. Source: Internet