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How Refraction Makes This Beaker Disappear Refraction is the change in direction of a wave, typically light, as it passes from one medium to another with a different optical density, due to a change in wave speed. When light travels from a less optically dense medium (like air) into a more optically dense one (like glass or water), it slows down and bends toward the normal (a line perpendicular to the boundary surface). This phenomenon is governed by Snell’s Law, expressed as n₁sinθ₁ = n₂sinθ₂,

Understanding Light: Reflection & Refraction for Grade 8 Science This instructional video introduces grade 8 students to the fundamental concepts of light behavior, focusing on reflection and refraction. Through animated demonstrations using plane and curved mirrors, as well as transparent blocks, lenses, and prisms, learners explore how light interacts with different surfaces. The video also connects these phenomena to everyday applications, making the science of light relatable and engaging. P