Question 11 of 12 ncorrec Map deb A pling A beam of initially unpolarized light

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Question 11 of 12 ncorrec Map deb A pling A beam of initially unpolarized light passes through a sequence of three ideal polarizers. The angle between the axes of the first and second polarizers is 21.3°, and the angle between the axes of the second and third polarizers is 50.7 What is the ratio of the intensity of light emerging from the third polarizer, 13, to the intensity of light incident on the first polarizer, lo? Number 21.3 o .348 50.7 o There is a hint available! ing on the divider bar again to hide the hint. Close A Previous ® Give Up & View Solution Check Answer Next Ext O Hint

Explanation / Answer

use Malus law as I = Io cos^2 theta

Intensity after passing through first polarizzer is 50%

so

I1 = Io/2

I2 = I1 cos ^2 ( 21.3)

I2 = 0.2965 Io

I3 = I2 cos ^2 (50.7)

I3 = 0.2965 Io * cos^2 (50.7)

I3 = 0.243 Io

I3/Io = 0.243

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