InterviewSolution
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InterviewSolution
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Explain various applications of Doppler effect. |
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Answer» Solution :To MEASURE the SPEED of an automobile An electromagnetic wave is emitted bya source attached to a police car. The wave is reflected by a moving vehicle, which acts as amoving source. There is a shift in the frequency of the reflected wave. From the frequency shift, the speed of the car can bedetermined. This helps to track the over speeding vehicles TRACKING a satellite The frequency of radio waves emitted by a satellite decreases as the emitted by a satellite decreases as the satellite passes away from the Earth By measuring the change in the frequency of the radio waves, the location of the SATELLITES is studied. RADAR (Radio Detection And Ranging) In RADAR, radio waves are sent,and the reflected waves are detected by the receiver of the RADAR station. From the frequency change, the speed and location of the aeroplanes and aircrafts are tracked. SONAR In SONAR, by measuring the change in the frequency between the sent signal and received signal, the speed of marine animals and SUBMARINES can be determined. |
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