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You have what you believe to be two polarizing filters. Each one alone should reduce the light passing through by one-half.

One filter is placed on top of the other and the intensity of the light is reduced to $25\%$ of the original light intensity.

Which of the following statements is true?

A

The second filter is thinner than the first because it only stops about half as much light.

B

The intensity of the light is decreased by another $25\%$; therefore, the angle between the filters is $25^\circ$.

C

The angle between the filters is $45^\circ$ because the decrease in intensity is proportional to the cosine squared.

D

Only one filter is actually a polarizing filter. If the second filter were a polarizing filter, no light would get through.

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