Energia kinetyczna [latex]Dane:[/latex] [latex]h=6,63* 10^{-34} J*s[/latex] [latex]f=8,5* 10^{14} Hz ( frac{1}{s} )[/latex] [latex]W=2,2eV=3,52* 10^{-19} J[/latex] [latex]Szukane:[/latex] [latex] E_{k}=?[/latex] [latex]Wzory:[/latex] [latex] E_{k} =hf-W[/latex] [latex]Rozwiazanie:[/latex] [latex]E_{k} =8,5* 10^{14} frac{1}{s} *6,63* 10^{-34} J*s-3,52* 10^{-19}J [/latex] [latex] E_{k} =56,355* 10^{-20} J-3,52* 10^{-19}J [/latex] [latex] E_{k} = 5,6355* 10^{-19} J-3,52* 10^{-19}J [/latex] [latex] E_{k}=2,1155* 10^{-19} J[/latex] Prędkość elektronu Dane: [latex]c=3* 10^{8} frac{m}{s} [/latex] [latex]h=6,63* 10^{-34} J*s[/latex] [latex]W=3,52* 10^{-19}J [/latex] [latex]f=8,5* 10^{14} frac{1}{s} [/latex] Wzory: λ=[latex] frac{ch}{W} [/latex] v=λ*f Szukane: λ=? v=? λ=[latex] frac{6,63* 10^{-34}J*s*3* 10^{8} frac{m}{s} }{ 10^{-19}J } [/latex] λ=[latex] frac{19,89* 10^{-26} }{3,52* 10^{-19} } m[/latex] λ≈[latex]3,651* 10^{-7} m[/latex] v=[latex]3,651* 10^{-7} m[/latex]*[latex]8,5* 10^{14} frac{1}{s} [/latex] v≈[latex]31,03* 10^{7} frac{m}{s} [/latex]
