In a Stack of Three Polarizing Sheets the First and Third

question 55

Multiple Choice

In a stack of three polarizing sheets the first and third are crossed while the middle one has its axis at 45° to the axes of the other two.The fraction of the intensity of an incident unpolarized beam of light that is transmitted by the stack is:

• A)1/2
• B)1/3
• C)1/4
• D)1/8
• E)0

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