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प्रश्न
How do bats locate their prey during a flight?
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उत्तर
Bats produce ultra sound which returns after striking an obstacle in their way. By hearing the reflected round, bats can judge the distance and direction of obstacle/prey in their way and hence bats can catch their prey during flight.
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संबंधित प्रश्न
The sketches I to IV in following Figure show sound waves, all formed in the same time interval.
 |
 |
| I | II |
 |
 |
| III | IV |
Which diagram shows
- a note from a musical instrument
- a soft (or feeble) note,
- a bass (low frequency) note.
Complete the following sentences:
An average person can hear sound of frequencies in the range ______ to _________.
Name the sound of the frequency given below:
40 kHz
State the approximate speed of ultrasound in air.
The properties of ultrasound that make it useful are
Name three animals which can hear ultrasonic vibrations.
What is Galton’s whistle? To what use is it put?
What are infrasonic and ultrasonic sounds?
What is echocardiography?
Describe a simple method to find the depth of a submerged ship.
