A convex lens produces a magnification of `+5`. The object is placed:

A convex lens of focal length 15 cm produces a magnification of +4 . The object is placed:

A convex lens produces an image of a real object on a screen with a magnification of 1/2. When the lens is moved 30 cm away from the object, the magnification of the image on the screen is 2. The focal length of the lens is

A convex lens produces an image of a real object on a screen with a magnification of 1/2. When the lens is moved 30 cm away from the object, the magnification of the image on the screen is 2. The focal length of the lens is

For thin convex lens if magnification is one then object distance and image distances are .....

An object placed at a distance of 16cm from a convex lens produces an image of magnification m(m gt 1) . If the object is moved towards the lens by 8cm then again an image of magnification m is obtained. The numerical value of the focal length of the lens is

A divergent lens produces an image of magnification 0.5 when the object distance is 10 cm. The focal power of the lens (in diopters)