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Answer:
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Explanation:
Definition: Doppler Effect refers to the change in wave frequency during the relative motion between a wave source and its observer. It was discovered by Christian Johann Doppler who described it as the process of increase or decrease of starlight that depends on the relative movement of the star.
Description: Doppler Effect works on both light and sound objects. For instance, when a sound object moves towards you, the frequency of the sound waves increases, leading to a higher pitch. Conversely, if it moves away from you, the frequency of the sound waves decreases and the pitch comes down. The drop in pitch of ambulance sirens as they pass by and the shift in red light are common examples of the Doppler Effect.
There are various applications of Doppler Effect. It is used in:
1. Sirens
2. Astronomy
3. Radars
4. Medical imaging and blood flow management
5. Flow management
6. Velocity profile management
7. Satellite communication
8. Audio
9. Vibration measurement