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 sifofin haske kuma muna iya gano karafa ta hanyar
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