Give reasons:
(a) An echo is heard near the hills.
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Explanation:
The reflection of sound is called echo. echo is heard only when surfaces are far away.it is because the ears cannot distinguish between the two voices when sound is reflected from a nearby surface . This phenomenon is most commonly observed on the hills . The echo is very clear when on hills .
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Answered by
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Answer:
Echo is heard from mountains, hills, big halls because their reflecting surface is strong, rigid and smooth which make the echo very effective. And due to that reason too they can't absorb any sound. So, echo is heard from mountains, hills, big halls.
Explanation:
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