Question: A prism, ABC, is configured such that angle BCA = 90 and angle CBA = 45. What is the minimum value of its index of

A prism, ABC, is configured such that angle BCA = 90° and angle CBA = 45°. What is the minimum value of its index of refraction if, while immersed in air, a beam traversing face AC is to be totally internally reflected from face BC?

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