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

Question

Three polarizing disks whose planes are parallel are centered on a common axis. The direction of the transmission axis in each case is shown in Figure P38.42 relative to the common vertical direction. A plane-polarized beam of light with E0 parallel to the vertical reference direction is incident from the left on the first disk with intensity Ii = 13.0 units (arbitrary).

Calculate the transmitted intensity If for the following cases.
(a) ?1 = 19.0°, ?2 = 43.0°, and ?3 = 60.0°

_____units

(b) ?1 = 0°, ?2 = 30.0°, and ?3 = 60.0°

_____units

Explanation / Answer

Final intensity given as

a).

I= 13* (cos 19)^2* (cos(43-19))^2*(cos (60-43))^2= 8.87 units

b)

I= 13* (cos 0)^2* (cos (30-0))^2* ( cos (60-30))^2.

= 7.312 units

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