lenses

Lenses are optical devices made of transparent materials that bend light to focus images. They can be found in glasses, cameras, microscopes, and telescopes. Lenses come in two main types: convex (thicker in the middle), which converge light rays to a point, and concave (thinner in the middle), which diverge light rays. Convex lenses create magnified images, while concave lenses can correct vision problems like nearsightedness. The science of how lenses work is based on refraction, the bending of light as it passes through different mediums. Understanding lenses is essential in various applications, from everyday eyewear to advanced scientific instruments.