Q.11.    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 on a hotter day?

Answers (1)
D Divya Prakash Singh

Listening to the sound of echo depends upon the time interval between the source of a sound and the reflecting sound which should be at least 0.1 seconds. 

The speed of the sound increases with an increase in the temperature of the medium. Hence, on a hotter day, the time interval between the source sound and the reflected sound will decrease.

Therefore, we cannot listen to the echo unless the interval is greater than 0.1 seconds.

Exams
Articles
Questions