Lesson 6: Refraction of Light ( प्रकाशाचे अपवर्तन) English Notes: • Refraction of Light: The phenomenon where a light ray changes its direction when it passes from one transparent medium to another (e.g., pencil appearing broken in water, coin seen after adding water). • Laws of Refraction: 1. The incident ray, the refracted ray, and the normal to the interface at the point of incidence, all lie in the same plane . 2. For a given pair of media, the ratio of sin(angle of incidence, i) to sin(angle of refraction, r) is constant . This is known as Snell's Law . (sin i / sin r = constant) • Refractive Index: ◦ The change in direction of light upon entering a different medium is related to the refractive index (n) of that medium. ◦ Its value differs for different media and also for different colors of light within the same medium. ◦ Absolute Ref...