Mataki na 11 yana koyo game da tsarin kwayoyin halitta, gami da tasirin kuzarin lantarki. Ana samar da launukan da ke cikin hoton a sakamakon electrons a cikin ions na karfe suna zama "mai sha'awar" bayan ɗaukar makamashi ta hanyar da ake kira "shanyewa". Lokacin da electrons suka sake rasa kuzari, suna fitar da sifofi masu tsayi na haske kuma muna iya gano karafa ta bakan da suke fitarwa. Wannan gwaji yana nuna ra'ayin canje-canjen ƙididdigewa a cikin tsari na electrons, wanda shine ainihin mahimmin mahimmin yadda atom ɗin ke aiki. Ana samun waɗannan karafa da ake amfani da su a wasan wuta don ba su halayensu.
Makaranta ta Duniya 
