A thin lens of focal length `+10.0 cm` lies on a horizontal plane mirror. How far above the lens should an object be be held if its image is to coincide with the object?

A convex lens of focal length 10 cm is placed at a distance of 12 cm from a wall. How far from the lens should an object be placed so as to form its real image on the wall?

A converging lens of focal length 5 cm is placed at a distance of 20 cm from a screen. How far from the lens should an object be placed so as to form its real image on the screen?

An object is placed in front of a thin convex lens of focal length 30cm and a plane mirror is placed 15cm behind the lens.If the final image of the object coincides with the object the distance of the object from the lens is

A convex lens of focal length 15 cm is placed on a plane mirror. An object is placed at 30 cm from the lens. The image is

A convex lens of focal length 15 cm is placed on a plane mirror. An object is placed at 30 cm from the lens. The image is

A convex lens of focal length 15 cm is placed on a plane mirror. An object is placed 20 cm from the lens. The image is formed