Using the thin lens equation calculate the image distance an

Using the \"thin lens equation\" calculate the image distance and magnification for an object placed in front of a biconvex (converging) lens for three cases. The focal length of the lens is taken to be 15cm.

Solution

thin lense equation

                             1 /F = 1 /do + 1 / di

                          here F = 15 cm ;

                              when do = 30cm ; di = 30cm       and m = 1    magnification m = di / do

                                    when do = 15cm ; di = infinite       and m = infinite

                                    when do = 10cm ; di = 15cm       and m = 1.5