A-0% B-12.5% C-50% D-25% E-75% B) how would this ratio change if we interchanged

Question

A-0% B-12.5% C-50% D-25% E-75%
B) how would this ratio change if we interchanged the first and last polarizer? Justify
hree polarizers, centered on a common axis and with their planes parallel to one other, ave transmission axes oriented at angles of,, 02, and 03 from the vertical, as shown in the figure below. Light of intensity 1, polarized with its plane of polarization oriented vertically is incident from the left onto the first polarizer. a) What is the ratio I/I, of the final transmitted intensity to the incident intensity for the if 2. = 90°, 02 = 45°, and 3-00?

Explanation / Answer

from the Malu's law

I = Ii cos^2 theta

I_1 = Ii/2

I_2 = I_1 cos^2 theta

= I _i/2 cos ^2 45

I_3 = I_2 cos^2 theta

I_3 = I_i/2 cos ^2 45 cos^2 ( 0-45)

I_f/ I_i = 0.25

= 25%

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(b)

I_1 = I_i cos^2 0

= I_i

I_2 = I_1 cos^2 ( 45- 0)

= I_i/2

I_3 = I_2 cos^2 ( theta_3- theta_2)

= I_i/2 cos^2 45

I_3/I_i = 1/4

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