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Question
State the use of echo by a bat, dolphin and fisherman.
Answer in Brief
Solution
- Use of Echo by Bat: Bats are able to both make and hear very high frequency sounds. Flying bats' high-frequency sounds reflect off of objects that cross their path in front of them. They can fly safely without running into objects by using the echo to locate them, even in the dark.
- Use of echo by dolphins: By creating ultrasonic waves and listening for their echoes, dolphins may identify enemies.
- Use of Echo by Fisherman: An extremely high-frequency vibrator may deliver a pulse of ultrasonic wave into the water, and the shoal of fish will echo back to identify the precise location of the fish. The total time of to and fro journey of the wave is noted. The Position of fish is calculated by d = `("Vt"/2)` v is speed of sound in water i.e. 1400 ms-1.
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Use of Echoes
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