Given below are two statements : Assertion (A): Refractive index of glass is higher than that of air. Reason (R): Optical density of a medium is directly proportionate to its mass density which results in a proportionate refractive index.
❓ Question Given below are two statements: Assertion (A): Refractive index of glass is higher than that of air. Reason (R): Optical density of a medium is directly proportionate to its mass density which results in a proportionate refractive index. 🖼️ Question Image ✍️ Short Solution Let’s carefully analyze both the Assertion (A) and Reason (R) to see which statements are true and whether R correctly explains A. 🔹 Assertion (A): Refractive index of glass is higher than that of air The refractive index (μ) tells us how much light slows down in a medium compared to vacuum. It is defined as: μ = c v where c c = speed of light in vacuum, and v v v = speed of light in the medium. In air , v ≈ c v \approx c , so μ ≈ 1. In glass , v < c v < c , so μ > 1. Hence, refractive index of glass is indeed higher than that of air. ✅ Assertion (A) is TRUE. 🔹 Reason (R): Optical density ∝ mass density ⇒ higher μ Optical density refer...