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प्रश्न
Explain how do bats locate the obstacles and prey in their way.
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उत्तर
Bats locate the obstacles and prey in their path by producing and hearing the ultrasound. They emit an ultrasound which returns after striking an obstacle in their way. By hearing the reflected sound and from the time interval (when they produce ultrasound and they receive them back), they can judge the direction and the distance of the obstacle in their way.
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संबंधित प्रश्न
A microphone is connected to the Y-input of a C.R.O Three different sounds are made in turn in front of the microphone. Their traces (a), (b) and (c) produces on the screen are shown in following figure.
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| (a) | (b) | (c) |
- Which trace is due to the loudest sound? Give reason for your answer.
- Which trace is due for the sound with the lowest pitch? Explain your answer.
Complete the following sentence:
Ultrasound is of frequency ___________.
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What do you understand by the term infrasonic vibrations?
The sonic boom of an aircraft has a time period of 0.00005s. Calculate the frequency of sound produced.
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What is echocardiography?
What does SONAR stand for? Where do we make use of SONAR?
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State the properties of ultrasound that make it useful.
