A convex lens and a Concave lens of focal length 0.1m each are placed co-axially 0.03m apart. Find the position of the image of an object placed 0.15m in front of the Convex lens.

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

Find the power of a convex lens of focal length 25 cm.

An object is kept at 0.2 m from a convex lens of focal length 0.15 m. Find the position of the image formed.

A convex lens of focal length 15 cm is placed in front of a convex mirror co-axially 5 cm from the mirror. The image of an object placed at a distance 20 cm from the lens found to have been formed over the object. Estimate the radius of curvature of the mirror.

An object is placed at a distance of 50 cm from a concave lens of focal length 20 cm. Find the nature and position of the image.

An object is placed 30cm away from a concave lens of focal length 15cm. Find the position, size and nature of the image.

a concave lens of focal length 20cm is placed in contact with a convex lens of focal length 40cm. Find the power of the combination.