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प्रश्न
How is it that bats are able to fly at night without colliding with other objects ?
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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.
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संबंधित प्रश्न
Give two practical applications of reflection of sound waves.
Explain how defects in a metal block can be detected using ultrasound.
Write the full name of 'SONAR'.
What happens to the pitch of a sound if its frequency increases ?
Fill in the blank with suitable word :
Pitch of sound depends on ....................
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 ?
Explain why, if we strike a table lightly, we hear a soft sound but if we hit the table hard, a loud sound is heard.
Name an animal which navigates and finds food by ecolocation.
Fill in the blank and explain.
To discover a sunken ship or objects deep inside the sea, ______ technology is used.
