A convex lens of focal length 20 cm can produced a magnified virtual as well as real image? Is this a correct statement? If yes, where shall be object be placed in each case for obtaining these images?

A convex lens of focal length 0.12 m produces an inverted image ,which is three times as long as the object.Find the distance between the object and the lens for a real image.

A convex mirror of focal elongth f produces an image magnified m times.The distance of the object from mirror is

A lens of focal length 12 cm produces a virtual image. The size of image is 1//3 times the size of the object. What kind of lens it is ? Determine the positions of the object and the image.

A convex lens of focal length 20 cm is placed at a distance of 24 cm from the screen how far from the lens should an object be placed so as to from a real image on the screen. Also find the nature and magnification of the image produced.

A compound microscope consists of an objective lens of focal length 2.0 cm and an eyepiece of focal length 6.25 cm separated by a distance of 15 cm. How far from the objective should an object be placed in order to obtain the final image at the least distance of distinct vision (25 cm)? What is the magnifying power of the microscope in?

A concave lens is placed in contact with a convex lens of focal length 25 cm.The combination produces a real image at adistance of 80 cm, when an object is at a distance of 40 cm. What is the focallength of concave lens ?

A concave lens is placed in contact with a convvex lens of focal lenght 25 cm.the combinatin produces a real image at a distance of 80 cm,when the object is at a distance of 40 cm.What is the focal length of the concave lens?

A lens of focal length 12 cm produces a virtual image,whose linear dimensions are 1//3 that of the object.What kind of a lens is it?Dtermine the position of the object and the image.