What is meant by sound ranging? Give one use of sound ranging.
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Sound ranging is the process of detecting obstacles with the help of echo. Animals like bats, dolphin use sound ranging to detect their enemies.
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State the use of echo by a bat, dolphin and fisherman.
How do bats avoid obstacles in their way, when in flight?
Name the waves used for sound ranging. State one reason for their use. Why are the waves mentioned by you not audible to us?
What is 'SONAR'? State the principle on which it is based.