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# 7. A ray, normally incident on a prism of index 1.5, has an angle of emergence...

7. A ray, normally incident on a prism of index 1.5, has an angle of emergence of-48.590°. Find: (a) the prism angle, and (b) the deviation. Construct the path of the ray. Ans.: (a) 30°; (b) 18.590°

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