InterviewSolution
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InterviewSolution
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Two beams, A and B, of plane polarised light with mutually perpendicular planes of polarisation are seen through a polarised light with mutually perpendicular planes of polarisation are seen through a polaroid. From the position when the beam A has maximum intensity (and beam B has zero intensity). a rotation of Polaroid through 30^@ makes the two beams appear equally bright. If the intiial intensities of the two beams are I_A and I_B respectively, then I_A//I_B equals : |
Answer» Solution : `I_A = cos^2 30^@ = I_B cos^2 60^@` `I_A((sqrt(3))/(2))^(2) = I_B (1/2)^2` `I_A (3/4) = I_B (1/4)` `(I_A)/(I_B) = 1/3` |
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