Choose the one alternative that best completes the statement or answers the question. -When light in air strikes the flat surface of a certain glass at 31.2° with the normal, the

Choose the one alternative that best completes the statement or answers the question.
-When light in air strikes the flat surface of a certain glass at 31.2° with the normal, the reflected ray is 100 percent polarized. What is the critical angle for the air-glass interface of this glass?

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