Unpolarized Light Is Passed Through Polarizer 1

Unpolarized light is passed through polarizer 1.The light then goes though polarizer 2 with its plane of polarization at 39.8° to that of polarizer 1.Polarizer 3 is placed after polarizer 2.Polarizer 3 has its plane of polarization at 30.8° to the plane of polarization of polarizer 2 and at 70.6° to that of polarizer 1.What fraction of the intensity of the original light gets though the last polarizer?

A) 0.436
B) 0.664
C) 0.332
D) 0.218
E) ​0.085

Correct Answer:

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