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JAMB Physics 2012 Question 27

Question 27

Waves

From the diagram above, if the particle F is at a distance X from O to the right, the phase of the vibration will be different from that at O by

Diagram for this question
  1. A.2πx/λ
  2. B.πx/λ
  3. C.λ/2πx
  4. D.λ/πx
Show the answer and explanation

Answer: A (2πx/λ)

Explanation

One wavelength λ corresponds to a phase change of 2π, so a distance x gives a phase difference of 2πx/λ.