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Consider following statements for refraction of light through prism, when angle of deviation is minimum. A. The refracted ray inside prism becomes parallel to the base. B. Larger angle prisms provide smaller angle of minimum deviation. C. Angle of incidence and angle of emergence becomes equal. D. There are always two sets of angle of incidence for which deviation will be same except at minimum deviation setting. E. Angle of refraction becomes double of prism angle. Choose the correct answer from the options given below: (1) A, B and E only (2) B, D and E only (3) B, C and D only (4) A, C and D only
- A, B and E only
- B, D and E only
- B, C and D only
- A, C and D only
Correct answer: A, C and D only
Solution
Options A, C, and D are correct because at minimum deviation, the light ray inside the prism is parallel to the base (A), the angles of incidence and emergence are equal (C), and there are indeed two angles of incidence that can produce the same deviation, except at the minimum deviation (D).
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