Three polarizing plates whose planes are parallel are centeredon a common axis.

Question

Three polarizing plates whose planes are parallel are centeredon a common axis. The directions of the transmission axes relativeto the common vertical direction are shown in Figure P24.53. Alinearly polarized beam of light with plane of polarizationparallel to the vertical reference direction is incident from theleft onto the first disk with intensity Ii =11.5 units (arbitrary). Calculate thetransmitted intensity If when1 = 15.0°, 2 =38.0°, and3 = 62.0°. (Hint: Make repeated use of Malus'slaw.)
If = 1units

Explanation / Answer

I1=11.5cos215oI2=I1cos2(2-1) which isI2=(11.5cos215o)cos2(38-15) I3=I2cos2(3-2) which isI3=((11.5cos215o)cos2(38-15))cos2(62-38) I3=I final When the light goes through the first polarizer, it bends whichcontinues throughout the three polarizers. The finalintensity is received by plugging and chugging equations intoMalus's Law.

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