Assertion :Echo is produced only when sound is incident on hard and polished surface Reason: Sound energy can be totally reflected by objects with soft and loose texture
A
Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
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B
Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
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C
Assertion is correct but Reason is incorrect
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D
Both Assertion and Reason are incorrect
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Solution
The correct option is D Both Assertion and Reason are incorrect Echo is a sound or sounds caused by the reflection of sound waves from the surface back to the listener. An echo occurs when a sound wave reflects back towards its source after hitting a hard surface.
Sound energy is absorbed by the hard objects and reflected by the soft materials.