InterviewSolution
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InterviewSolution
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Two particles A and B have a phase difference of n when a sine wave passes through the region.(a) A oscillates at half the frequency of B.(b) A and B move in opposite directions.(c) A and B must be separated by half of the wavelength.(d) The displacements at A and B have equal magnitudes. |
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Answer» (b) A and B move in opposite directions. EXPLANATION: The frequencies of the particles will be the same, so the option (a) is not true. Let the displacement of the particle at A be y = A' sin(⍵t-kx) and of the particle at B be y' = A' sin(⍵t-kx+π) = -A' sin(⍵t-kx) So, y = -y'. Thus A and B move in opposite directions and the displacements at A and B have equal magnitudes. So, the options (b) and (d) are true. When the phase difference of A and B is π, the separation between them maybe (nλ+λ/2) = (2n+1)λ/2, where n = 1, 2, 3,....... The option (c) is a special case, hence not true. |
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