The image of the moon is produced bya convex lens of focal length f. The area of image is directly proportional to:

An object is placed at a distance of f/2 from a convex lens of focal length f. The image will be

An object is placed at a distance of f/2 from a convex lens of focal length f. The image will be

If the distances of an object and its virtual image from the focus of a convex lens of focal length f are 1 cm each, then f is

If the distances of an object and its virtual image from the focus of a convex lens of focal length f are 1 cm each, then f is

If the distances of an object and its virtual image from the focus of a convex lens of focal length f are 1 cm each, then f is

An object placed 10 cm in front of a convex lens of focal length 15 cm. The image produced will be

An object is situated at a distance of f//2 from a convex lens of focal length f Distance of image will be-