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

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Question 11 of 12 Map deb A pling A beam of initially unpolarized light passes through a seguence of three ideal polarizers. The angle between the axes of the first and second polarizers is 17.9°, and the angle between the axes of the second and third polarizers is 59.3. 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 17.9 o 59.3 A Previous ® Give Up & View Solution Check Answer Next Ext O Hint

Explanation / Answer

Intensity of unpolarized light Io=Io

Intensity of the light after passing through first polarizer I1=Io/2= 0.5 Io

Intensity of the polarized light after passing through second polarizer I2 = I1 cos 2 17.9 o

                                                                                                       = 0.5Io (0.90553)

                                                                                                       = 0.4527 Io

Intensity of the polarized light after passing through third polarizer I3 = I2 cos 2 59.3 o

                                                                                                       = 0.4527Io (0.2606)

                                                                                                       = 0.118 Io

I3/Io = 0.118

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