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When sound is reflected from a distant o...

When sound is reflected from a distant object, an echo is produced. Let the distance between the reflecting surface and the source of sound remain the same. Do you hear an echo sound on a hotter day? Justify your answer.

Text Solution

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(i) An echo can only be heard if it reaches the ear after 0. ls. Time taken = Total distanceI Velocity.
(ii) If the temperature rises (i.e. on a hotter day), the velocity of sound will increase.
(iii) On a hotter day, the velocity of sound is more, so if the time taken by the echo is less than 0.1 s, it cannot be heard.
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