Tag: conditions for hearing echo

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Multiple choice physics study of sound conditions for hearing echo echo ultrasound and its applications

It has been seen that the behaviour of animals becomes unusual just before the tremor is felt.what is the reason behind this?

  1. Because animals are able to detect infrasonic waves produced at the time of tremor.

  2. Because animals are able to detect ultrasonic waves produced at the time of tremor.

  3. Because animals are able to detect audible waves produced at the time of tremor.

  4. All
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Explanation

Has been seen that the behaviour of animals becomes unusual just before the tremor is felt.This is because animals are able to detect infrasonic waves produced at the time of tremor. Infrasonic waves are waves of frequency less than 20Hz.