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Q.

Is it true that we can hear echoes more clearly in a field surrounded by trees and bushes than in an empty hall?


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a

True

b

False 

answer is B.

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Detailed Solution

The above statement is False.
Trees and bushes work as the noise absorber in the field. Their trunk works as a reflector surface, and leaves vibrate according to the frequency of the sound waves hence transferring the sound waves more easily. In addition, spacing between the leaves works as a noise absorber. Hence echo is not clearly heard in the field surrounded by trees and bushes.
The correct statement would be, we can hear echoes more clearly in an empty hall than in a field surrounded by trees and bushes.
 
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