Advertisements
Advertisements
प्रश्न
How is it that bats are able to fly at night without colliding with other objects ?
Advertisements
उत्तर
Bats are able to fly at night without colliding with other objects because they emit ultrasonic squeaks and listen to the echoes produced by the reflection of their squeaks from the objects or obstacles in their path. Bats can judge the distance of the object in their path and avoid it by changing the direction using the time taken by the echo to be heard after reflection from the obstacle.
APPEARS IN
संबंधित प्रश्न
How is ultrasound used for cleaning?
Name the characteristic of sound which depends on (a) amplitude (b) frequency, and (c) waveform.
Name the characteristic of sound which can distinguish between the 'notes' (musical sounds) played on a flute and a sitar (both the notes having the same pitch and loudness).
What is the name of the device which is used to find the depth of sea (or ocean) by using ultrasonic sound waves ?
What name is given to sound waves of frequencies higher than 20 kHz ?
What is meant by the 'loudness' of sound ? On what factor does the loudness of a sound depend ?
Explain how, bats use ultrasound to catch the prey.
Explain how, flaws (or defects) in a metal block can be detected by using ultrasound.
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).
The depth of an ocean can be determined by ______.
