Two beams A and B of plane polarized light with mutually perpendicular planes of polarization are 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 initial intensities is of the two beams are IA and IB respectively, then IAIB is equal to,

Two beams A and B of plane polarized light with mutually perpendicular

1.	Two beams A and B of plane polarized light with mutually perpendicular planes of polarization are 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 initial intensities is of the two beams are IA and IB respectively, then IAIB is equal to,
Answer» Two beams $A$ and $B$ of plane polarized light with mutually perpendicular planes of polarization are through a polaroid. From the position when the beam $A$ has maximum intensity (and beam $B$ has zero intensity), a rotation of polaroid through $30^{\circ}$ makes the two beams appear equally bright. If the initial intensities is of the two beams are $I_{A}$ and $I_{B}$ respectively, then $\frac{I_{A}}{I_{B}}$ is equal to,

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