How it works?

                 It works in two main categories. Fist one is one lense experiment. Other one is two lense experiment.In one lense experiment, there are two categories with biconvex , biconcave lenses. In two lense experiment, there are four categories with the pairs (biconvex,biconvex),(biconcave,biconcave),(biconvex,biconcave),(biconcave,biconvex). Each categories works five different cases such as object beyond 2F , object between F and 2F , object at 2F , object at F , object within F.