Shown an object and its image formed by a thin lens. Then the nature and focal length of lens is

The minimum distance between a real object and its real image formed by a thin converging lens of focal length f is

The minimum distance between a real object and its real image formed by a thin converging lens of focal length f is

The minimum distance between an object and its real image formed by a thin convex lens of focal length f is K.f . Find the value of K .

The minimum distance between an object and its real image formed by a thin convex lens of focal length f is K.f . Find the value of K .

A convex lens forms an image of an object on a screen 30 cm from the lens. When the lens is moved 90 cm towards the object, then the image is again formed on the screen. Then, the focal length of the lens is

A convex lens forms an image of an object on a screen 30 cm from the lens. When the lens is moved 90 cm towards the object, then the image is again formed on the screen. Then, the focal length of the lens is

The distance between an object and its real image formed by a lens is D. If the magnification is m , the focal length of the lens is

If in a convex lens object and its image distances are each equal to d, the focal length of the lens is

The graph shown relationship between object distance and image distance for a equiconvex lens. Then focal length of the lens is

The graph shown relationship between object distance and image distance for a equiconvex lens. Then focal length of the lens is