I have never understood how images are reflected in mirrors, even now that I am going into my fourth year of university I have some really basic (probably stupid) questions that I need to ask. When an word is reflected in a mirror, why do the letters appear reversed but the word doesn't (the letters still appear in the same order)? Secondly, why do they appear reversed from side to side but not top to bottom? I know these questions are probably stupid but I really can't work them out. Thanks.