Assertion :When a waves travels from a denser medium to rarer medium amplitude of oscillation increases. Reason: In denser medium speed of wave is less compared to a rarer medium.

Both Assertion and Reason are correct and Reason is the correct explanation for Assertion

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Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion

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Assertion is correct but Reason is incorrect

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Assertion is incorrect but Reason is correct

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Solution

The correct option is B Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
The wave when it moves from a denser to rarer medium, the velocity of the wave increases.
To ensure conservation of energy (constant power transmission), the amplitude must increase also.
Hence both assertion and reason are true, but the reason is not the correct explanation for the assertion. Hence option B.

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Similar questions

Q. Choose the correct option for the given assertion and reason.

Assertion : When a wave travels from a denser medium to rarer medium, its amplitude of oscillation increases.

Reason : In denser medium, speed of wave is less compared to that in rarer medium.

Assertion (A) Addition reaction of water to but-1-ene in acidic medium yields butan-1-ol.
Reason (R) Addition of water in acidic medium proceeds through the formation of primary carbocation.
(a) Assertion and reason both are correct and reason is correct explanation of assertion.
(b) Assertion and reason both are wrong statements.
(c) Assertion is correct statement but reason is wrong statement.
(d) Assertion is wrong statement but reason is correct statement.
(e) Both assertion and reason are correct statements but reason is not correct explanation of assertion.

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