Advertisements
Advertisements
Question
Explain how the principle of echo is used by
The dolphin to locate small fish as its prey
Advertisements
Solution
Dolphins detect their enemies and small fishes by emitting ultrasonic waves in all directions and then hearing their reflected sound i.e. echo. Dolphins can judge the nature of obstacles or of small fish by hearing the echo and catch their prey.
APPEARS IN
RELATED QUESTIONS
Define frequency term in relation to a wave.
Define wave velocity term in relation to a wave.
How do bats avoid obstacles in their way, when in flight?
What is a soundboard ? Explain the working of a soundboard with the help of a labelled diagram.
What do you mean by reflection of sound? State one condition for the reflection of a sound wave. Name a device in which reflection of sound wave is used.
Mention two properties of a wave, one property which varies and the other which remains constant when the wave passes from one medium to another.
Why will an echo not be heard when the distance between the source of the sound and the reflecting surface is 10 m?
