Distance of an object from a concave lens of focal length 20 cm is 40 cm. Then linear magnification 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.

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 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 4 cm from a concave lens of focal length 12 cm. Find the position and nature of the image.

An object is held at a distance of 20cm from a concave lens of focal length 80 cm. What is the position and size of the image if the object is 2 cm high ?

An object is placed at a distance of 20 cm from a thin double convex lens of focal length 15 cm. Find the position and magnification of the image.

An object is placed at a distance of 30cm from a concave mirror of focal length 20 cm. Find the position, nature and the magnification of the image. Draw a ray diagram.

A diverging lens of focal length 15 cm forms an image 10 cm from the lens. Calculate the distance of the object from the lens, given mu = 1.5 . What is the linear magnification of the image ?

A luminous object is placed at a distance of 40 cm from a converging lens of focal length 25 cm. The image obtained in the screen is