Magana: Tare da dokokinsa Stefan ya kuma ƙayyade zafin jiki na farfajiyar Rana. Ya yanke shawara daga bayanan Jacques-Louis Soret (1827<unk>1890) cewa yawan ƙarfin kuzari daga Rana ya ninka sau 29 fiye da ƙarfin kuzari na wani lamella na ƙarfe mai zafi (wani farantin bakin ciki). An sanya lamella mai zagaye a irin wannan nisa daga na'urar auna cewa za a gani a daidai kusurwar da Rana. Soret ya kiyasta yawan zafin jiki na lamella ya kasance kusan 1900 ° C zuwa 2000 ° C. Stefan ya yi tsammani cewa 1⁄3 na ƙarfin kuzari daga Rana yana sha da yanayin duniya, don haka ya ɗauki daidai don ƙarfin kuzari na Rana darajar 3/2 sau mafi girma fiye da ƙimar Soret, wato 29 × 3 / 25 = 43. Tambaya: Menene Stefan yayi a kusa da ma'aunin zafin jiki na na'urar?
Zagaye lamella