An object of 4 cm height is placed in front of a concave lens. An image of size 2 cm is formed at a distance of 15 an from the lens. Find the object distance and the focal length of the lens.

A rod of 2 cm in height is held in front of a convex lens. The, image formed at a distance 60 cm and object at 10 cm from the mirror. What is the focal length of the lens ?

An object is placed at a distance of 30 cm from a convex lens. A real image of magnification 1.5 is formed. Find the location of the image and the focal length of the tens.

Find the power of a concave lens of focal length 2 m ?

When an object is placed at a distance 6 cm from a concave lens a virtual image is formed at a distance 4cm from it. Find the focal length of the lens.

An object is placed in front of a convex lens of focal length 30 cm. An image of magnification +2 is formed on the same side of the convex lens. Find the nature and position of the image. Also, draw a ray diagram.

An object is placed at the focus of concave lens. Where will its image be formed?