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The sound heard after reflection from...

The sound heard after reflection from an obstacle is called

A

Noise

B

echo

C

musical sound

D

none of these

Text Solution

Verified by Experts

The correct Answer is:
B
echo
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Read the given passage and select the correct option for the following questions. The sound returning back towards the source after suffering reflection from a distant obstacle like wall, hill etc. is called an echo. A cracker is fired by a child. The child hears an echo from a cliff 4 seconds after the sound produced by a cracker. The speed of sound in air at 20^(@)C is 344 ms^(-1) . What is the minimum distance between the observer and the obstacle for echo to be heard?

Read the given passage and select the correct option for the following questions. The sound returning back towards the source after suffering reflection from a distant obstacle like wall, hill etc. is called an echo. A cracker is fired by a child. The child hears an echo from a cliff 4 seconds after the sound produced by a cracker. The speed of sound in air at 20^(@)C is 344 ms^(-1) . How far is the cliff from the child?

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MCGROW HILL PUBLICATION-MISCELLANEOUS QUESTIONS-PART-B
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  12. A cube has numerically equal volume and surface area. The volume of su...

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  13. A body covers a distance of L along a semicircular path. Then the rati...

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  14. The variation of quantity P with quantity Q, describes the motion of a...

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