Refraction of Light and Refractive Index MCQs
Practice Refraction of Light and Refractive Index multiple-choice questions from Light - Reflection and Refraction (Class 10 Science) - tap an answer for instant feedback and a step-by-step solution. Practice the full set free on the RankByte app.
Refraction of Light and Refractive IndexQuiz - Solve & Score
Q1. The absolute refractive index of medium X is 1.5 and that of medium Y is 2.0. What is the refractive index of Y with respect to X?
- A.1.33
- B.0.75
- C.3.0
- D.0.5
Answer: A. 1.33
Q2. The absolute refractive index of water is 4/3 and of glass is 3/2. If the speed of light in glass is 2 × 10⁸ m/s, what is the speed of light in water?
- A.2.25 × 10⁸ m/s
- B.1.5 × 10⁸ m/s
- C.3 × 10⁸ m/s
- D.2 × 10⁸ m/s
Answer: A. 2.25 × 10⁸ m/s
Q3. Which has the highest refractive index among the following?
- A.diamond
- B.air
- C.glass
- D.water
Answer: A. diamond
Eliminate first - option B) 'air' fails since Air (about 1.0) is the lowest; option C) 'glass' fails since Glass (about 1.5) is lower than diamond (about 2.42); option D) 'water' is incorrect: Water (1.33) is much lower than diamond. That leaves only option A). Confirm with the chapter rule: Refractive index n = c/v = speed of light in vacuum / speed in the medium; equivalently sin(i)/sin(r) for light going air -> medium; substitute the given data into either relation => n reduces to a single value; so the answer = diamond (physics, chapter 'Light - Reflection and Refraction'). Answer: A) diamond.
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