NEET Physics Wave Motion Assertion Reason Question
Assertion (A): The wave described by y(x, t) = 0.005 sin(80.0 x - 3.0 t) travels in the positive x-axis direction.
Reason (R): In the equation y(x, t) = a sin(kx - ωt), the wave travels in the positive x-axis direction when the sign before ωt is negative.
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 wave equation y(x, t) = a sin(kx - ωt) represents a wave traveling in the positive x-direction. The negative sign before ωt confirms this, as stated in Chunk 4 of the NCERT context.
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