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Optics-Refraction of Light Practice Questions - Page 2

Questions 11–20 of 35 · Page 2 of 4

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Q11Under which of the following conditions does Total Internal Reflection (TIR) occur?MediumSolve →Q12The critical angle for diamond is about 24°. If the incident angle is greater than this, what happens?MediumSolve →Q13If the refractive index of water is 1.33, what is the critical angle for the water-air interface?MediumSolve →Q14Lateral shift in a glass slab occurs because:MediumSolve →Q15Which of the following devices uses total internal reflection? 1. Optical fibre 2. Binoculars 3. Diamonds sparkle Select the correct answer:MediumSolve →Q16In a rainbow formation, what is the order of processes?MediumSolve →Q17Which of the following statements explains why stars appear to twinkle but planets do not? 1. The twinkling of stars is due to atmospheric refraction. 2. Planets appear larger in angular size than stars, so the variations average out. 3. Twinkling is due to the reflection of light by the atmosphere. Select the correct statement(s):MediumSolve →Q18Which physical quantity remains unchanged during refraction?MediumSolve →Q19Which is the correct expression for refractive index?MediumSolve →Q20A coin at the bottom of a water tank appears:MediumSolve →
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