A Linearly Polarized Electromagnetic Wave Is Sent Through Two Sheets

A linearly polarized electromagnetic wave is sent through two sheets of polarizing material. The first sheet, A, is oriented so that its transmission axis makes an angle of 30° with respect to the incident electric field of the wave. The second sheet, B, is oriented so that its transmission axis makes an angle of 90° with the incident electric field of the wave. The incident beam has an electric field of peak magnitude E₀ and average intensity S₀.
-What is the average intensity of the wave after it passes through B?

A) 0.19S₀
B) 0.34S₀
C) 0.43S₀
D) 0.50S₀
E) zero

Correct Answer:

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