Thin Lens Theory

Thin Lens Theory in geometrical optics describes how lenses bend light rays to form images. A thin lens, characterized by its curved surfaces, can be converging (convex) or diverging (concave). When light passes through a lens, it refracts, causing parallel rays to converge at a focal point or spread out. The position and size of the resulting image depend on the object's distance from the lens. This theory helps explain how eyeglasses, cameras, and other optical devices function by predicting image characteristics based on lens shape and placement.