GENERAL KNOWLEDGE

Detailed explanation-1: -What is Doppler Shift? The Doppler shift, also known as the Doppler effect, is defined as the change in the wavelength or frequency of the waves with respect to the observer who is in motion relative to the wave source. The Doppler shift was theorised in the year 1842 by the Austrian physicist Christian Doppler.

Detailed explanation-2: -The Doppler effect or Doppler shift (or simply Doppler, when in context) is the apparent change in frequency of a wave in relation to an observer who is moving relative to the wave source. It is named after the Austrian physicist Christian Doppler, who described the phenomenon in 1842.

Detailed explanation-3: -Doppler shift or Doppler effect is defined as the change in frequency of sound wave due to a reflector moving towards or away from an object, which in the case of ultrasound is the transducer.

Detailed explanation-4: -The Doppler effect, or Doppler shift, describes the changes in frequency of any kind of sound or light wave produced by a moving source with respect to an observer. Waves emitted by an object traveling toward an observer get compressed-prompting a higher frequency-as the source approaches the observer.