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 wave velocity term in relation to a wave.
What is a stethoscope ? Name the principle on which a stethoscope works.
What are infrasonic waves?
Write the approximate value of the speed of sound in iron.
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.
State two factors on which the natural frequency of a body depends.
Write short notes on reflection of sound waves from plane and curved surfaces.
