In the diagram shows below rays are coming from infinity and after passing through both the lenses meet on a screen placed at a distance of 30 cm from the concave lens. Calculate the focal length of the concave lens.

From the ray diagram shown in Fig. calculte the focal length of concave lens. .

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

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

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.

Ray coming from an object situated at infinity, fall on a convex lens and an image is formed at a distance of 16 cm from the lens. When a concave lens is kept in contact with the convex lens, the image is formed at a distance of 20 cm from the lens combination. Calculate the focal length of the concave lens.

An object is placed at a distance of 4 cm from a concave lens of focal length 12 cm. Find the position and nature of the image.

A concave lens produces an image 20 cm from the lens of an object placed 30 cm from the lens. The focal length of the lens is:

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 arrangement of a concave and a convex lens is shown below. The focal length of the convex lens is 30 cm. Parallel rays coming from a distant source are focused on the screen after passing through the lenses. Calculate the focal length of the concave lens.