Geometric Optics is a branch of physics that studies how light behaves when it travels through different materials. It focuses on the paths that light rays take, using simple shapes and angles to explain phenomena like reflection and refraction. For example, when light hits a mirror, it bounces back at the same angle, a principle known as the law of reflection. In Geometric Optics, lenses play a crucial role in focusing light. Convex lenses can converge light rays to a point, while concave lenses diverge them. This understanding helps us design various optical devices, such as glasses, cameras, and microscopes, enhancing our ability to see and capture images clearly.