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Question 31392
JEE Physics · Hard

Waves on String: Polarisation MCQ

Solve this quality-checked JEE multiple-choice question, then review the correct answer and explanation.

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PolarisationHardQuestion 31392

Question

A transverse string wave can be polarised because:
  1. A
    String waves are longitudinal
  2. B
    Transverse displacement can be in any direction perpendicular to propagation — polarisation selects one
    Correct
  3. C
    String is circular
  4. D
    Frequency is fixed

Correct answer

Transverse displacement can be in any direction perpendicular to propagation — polarisation selects one

Explanation

String waves are transverse. Displacement can be in y-direction (vertical), z-direction (horizontal), or any linear combination. A groove or slot acts as a polariser, allowing only one direction of vibration to pass.

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