Question

when a sound is reflected from a distant object, an echo is produced. let the distance between the reflecting surface and the source of sound production remains the same. do you hear echo sound in a hotter day?

Answer 1

We know that the speed of sound increases with increase in temperature, so the minimum distance required to hear an echo also increases. If the distance between the source and the sound is greater than the minimum distance required, then echo is heard. But if the distance is lesser, then echo will not be heard.

Answer 2

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An echo is heard when the time interval between the original sound and the reflected sound is at least 0.1 s.

The speed of sound in a medium increases with an increase in temperature.

Hence, on a hotter day, the time interval between the original sound and the reflected sound will decrease.

Therefore, an echo can be heard only if the time interval between the original sound and the reflected sound is greater than 0.1 s.

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