Advertisements
Advertisements
Question
Explain how, bats use ultrasound to catch the prey.
Advertisements
Solution
Bats emit ultrasonic squeaks while flying and listen to the echoes produced by the reflection of their squeaks from their prey. From the time taken by the echo to be heard, bats can judge the distance of the prey in their path and catch them.
RELATED QUESTIONS
A submarine emits a sonar pulse, which returns from an underwater cliff in 1.02 s. If the speed of sound in salt water is 1531 m/s, how far away is the cliff?
Explain the working and application of a sonar.
A sonar device on a submarine sends out a signal and receives an echo 5 s later. Calculate the speed of sound in water if the distance of the object from the submarine is 3625 m.
A wave is moving in air with a velocity of 340 m/s. Calculate the wavelength if its frequency is 512 vibrations/sec.
How does the pitch of a sound depend on frequency ?
Fill in the blank with suitable word :
Quality of sound depends on ........................
Explain the term 'pitch' of a sound. On what factor does the 'pitch' of a sound depend ?
What is the range of frequencies associated with (a) infrasound (b) audible sound, and (c) ultrasound ?
Which of the two produces ultrasonic waves : porpoise or whale ?
A sonar station picks up a return signal after 3 seconds. How far away is the object ? (Speed of sound in water = 1440 m/s).
