Explaining The Universe on Instagram: "When light passes through a glass lens, it bends because of a process called refraction. This happens as light changes speed when moving from air into glass, causing it to change direction. The way the light bends depends on the shape of the lens. A convex lens, which is thicker in the middle, bends light rays inward and focuses them at a single point called the focal point. These lenses are used in magnifying glasses, cameras, and eyeglasses for farsighted