Three polarizing plates whose planes are parallel are centered on a common axis.

Question

Three polarizing plates whose planes are parallel are centered on a common axis. The directions of the transmission axes relative to the common vertical direction are shown in the figure below. A linearly polarized beam of light with plane of polarization parallel to the vertical reference direction is incident from the left onto the first disk with intensity Ii = 11.0 units (arbitrary). Calculate the transmitted intensity If when 1 = 15.0°, 2 = 37.0°, and 3 = 57.0°. Hint: Make repeated use of Malus's law. If = ___ units

Explanation / Answer

I(final) = Ii cos^2 ( 15) cos^2 (37) cos^2 ( 57)

I final = 11 (0.933) (0.6378) (0.2966) =

Ifinal=1.94167 units apprx

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