NEET Physics Wave Motion MCQ Question
Which of the following statements about wave motion is correct?
The displacement of a wave at a fixed location varies sinusoidally with time.
The wavelength of a wave is defined as the distance between two points of opposite phase.
A wave traveling in the positive direction has a form represented by y(x,t) = a sin(kx + wt).
The angular wave number k is equal to the wavelength divided by 2π.
Correct Answer
Detailed Explanation
Statement A is correct as it reflects that the displacement at a fixed location varies sinusoidally with time. Statement B is incorrect because wavelength is defined as the distance between points of the same phase, not opposite phase. Statement C is incorrect; the correct form for a wave traveling in the positive direction is y(x,t) = a sin(kx - wt). Statement D is incorrect as k is defined as 2π/λ, not λ/2π.
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