In the image given below, objects placed at which among the following positions will have images with magnification greater than or equal to 1?
When an object is placed in front of a concave mirror of focal length f, a virtual image is produced with a magnification of 2. To obtain a real image with a magnification of 2, the object has to be moved by a distance equal to
An object is placed at a distance of 20 cm in front of a concave lens of focal length 20 cm. Find :
(a) the position of image, and
(b) the magnification of image.