A converging lens has a focal length of 21.1 cm.
(a) Locate the object if a real image is located at a distancefrom the lens of 63.3 cm.
(b) Locate the object if a real image is located at a distance fromthe lens of 105.5 cm.
(c) Locate the object if a virtual image is located at a distancefrom the lens of -63.3 cm.
(d) Locate the object if a virtual image is located at a distancefrom the lens of -105.5 cm.
