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Intro to Standing Waves

Assertion :St...

Question

Assertion :Standing waves are formed when amplitudes of two constituent waves are equal. Reason: At any point net displacement at a given time is resultant of displacement of constituent waves.

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 D Assertion is incorrect but Reason is correct
At any point at any given time, net displacement is the sum of displacement of all individual constituent waves. Two similar waves moving in opposite directions, when superimposed would give a stationary wave (other conditions apart from same amplitude must be satisfied).
Hence assertion is false, reason is true.
Option D.

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