A convex lens of focal length 30 cm is palced coaxially in contact with a concave lens of focal length 40 cm. Determine the power of the combination. Will the system be converging or diverging in nature?

A convex lens of focal length 25 cm is placed coaxially in contact with a concave lens of focal length 20 cm. Determine the power of the combination. Will the system be converging or diverging in nature?

A convex lens of focal length 25 cm is placed co-axially in contact with a concave lens of focal length 20 cm . Determine the power of the combination. Will the system be converging or diverging in nature ?

A convex lens of focal length 25 cm is placed co-axially in contact with a concave lens of focal length 20 cm . Determine the power of the combination. Will the system be converging or diverging in nature ?

A convex lens of focal length 25 cm is placed co-axially in contact with a concave lens of focal length 20 cm . Determine the power of the combination. Will the system be converging or diverging in nature ?

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.

A convex lens of focal length 20 cm is placed in contact with a concave lens of focal length 10 cm. What is the focal length and power of the combination ?

A convex lens of focal length 25 cm is kept is contact with a concave lens of focal length 40 cm. What is the power of their combination ?

A convex lens of focal length 10 cm is placed in contact with a concave lens of focal length 20 cm. What is the nature and focal length of the combination ?