Question: (a) What is the minimum index of refraction for a glass or plastic prism to be used in binoculars (Fig. 23-26) so that total internal

(a) What is the minimum index of refraction for a glass or plastic prism to be used in binoculars (Fig. 23-26) so that total internal reflection occurs at 45o?
(b) Will binoculars work if its prisms (assume n = 1.50) are immersed in water?
(c) What minimum n is needed if the prisms are immersed in water?

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