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प्रश्न
How is it that bats are able to fly at night without colliding with other objects ?
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
Explain how bats use ultrasound to catch a prey.
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).
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Write the full name of 'SONAR'.
What name is given to sound waves of frequencies higher than 20 kHz ?
Explain the term 'pitch' of a sound. On what factor does the 'pitch' of a sound depend ?
What is meant by the quality (or timbre) of sound ? On what factor does the quality (or timbre) of a sound depend ?
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The ultrasound waves can penetrate into matter to a large extent because they have :
Expand the abbreviation of the term SONAR.
