Lens formula

The lens formula relates the distance of an object from a lens, the distance of the image formed, and the focal length of the lens. It’s expressed as 1/f = 1/v + 1/u, where f is the focal length, v is the image distance, and u is the object distance. This formula helps determine where an image will appear when using a lens, whether it’s focused or magnified. It’s useful in photography, glasses, microscopes, and optical devices to understand how lenses bend light to form images at different positions.