NEET Physics Wave Motion MCQ Question
Which of the following statements about wave motion is correct?
The amplitude of a wave described by y(x, t) = 2a sin(kx) cos(wt) varies from point to point.
In the wave function y(x, t) = a sin(kx - wt), different points on the string oscillate in phase.
A wave can propagate through a vacuum if it is a mechanical wave.
The wave described by y(x, t) = 2a sin(kx) cos(wt) moves to the right.
Correct Answer
Detailed Explanation
Statement A is correct as the amplitude varies from point to point in the wave function y(x, t) = 2a sin(kx) cos(wt). Statement B is incorrect because different points oscillate with the same angular frequency but not necessarily in phase. Statement C is false since mechanical waves require a medium, while statement D is incorrect as the wave pattern described does not propagate in a specific direction.
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