How to Calculate Critical Angle

Light rays travel through a layer of kerosene floating on the surface of water that has a refractive index of 1.33. Light rays that are incident on the interface of kerosene and water at angles of 1 6 . 9 ∘ from the surface or less are totally internally reflected. What is the refractive index of the kerosene? Give your answer to two decimal places. In this video, we delve into the concept of the critical angle and how to calculate it in optics. We'll explain what the critical angle represents and its significance in determining whether light undergoes refraction or total internal reflection. Using clear diagrams and practical examples, we'll demonstrate how to apply Snell's Law to find the critical angle for different materials and interfaces. You'll learn about the conditions necessary for total internal reflection to occur, and how the refractive index of materials affects the critical angle. Whether you're a student studying optics, an engineer working with optical fibers, or simply curious about the behavior of light, this video will provide a comprehensive understanding of the critical angle and its applications in optics and physics.