Jahir Ali Khan on Instagram: "This simple experiment perfectly demonstrates refraction — the bending of light as it passes from one medium to another. Here’s what’s happening 👇 When light travels from air to water (or plastic), its speed slows down, causing it to bend. Because of this bending, the coin appears shifted or visible even though it’s under the surface. The plastic bag and water together act like a lens, refracting the light rays toward your eyes. It’s the same principle that makes o