NEET Physics Wave Motion Assertion Reason Question
Assertion (A): The amplitude of a standing wave on a string varies from point to point along the string. | Reason (R): The principle of superposition causes interference between two harmonic waves with the same wavelength travelling in opposite directions.
Both A and R are true and R is the correct explanation of A.
Both A and R are true but R is not the correct explanation of A.
A is true but R is false.
A is false.
Correct Answer
Detailed Explanation
The NCERT context states that in the wave pattern described by y(x, t) = 2a sin kx cos wt, the amplitude varies from point-to-point due to the superposition of two waves travelling in opposite directions, leading to interference.
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