MCQEasy1 mark
1
Choose the correct answers to the questions from the given options. (Do not copy the questions, write the correct answers only.)
From the figure given below, the refractive index of medium B with respect to medium A (ₐμᵦ) is: (a) sin 45° / sin 30° (b) sin 30° / sin 45° (c) sin 45° / sin 60° (d) sin 60° / sin 45°
Topic: Relative refractive index
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Answer
Exam answer
(d) sin 60° / sin 45°.
Explanation
The marked angles are with the surface. Therefore i = 90° − 30° = 60° and r = 90° − 45° = 45°. Thus ₐμᵦ = sin i / sin r.
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