Question

When the sound from the distant object an echo is produced. Let the distance between the reflecting surface and the source of sound prodection remainsthe same . Do you hear acho sound on a hotter day?

Answer 1

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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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