Ek = Ef - W Ef = hc / λ W = 2,1 * 1,6 * 10^(-19)J = 3,36 * 10^(-19)J λ = 300mm = 3 * 10^(-7)m h (stała Plancka) = 6,63 * 10^(-34)Js c (prędkość światła) = 3 * 10^8m/s Ef = [6,63 * 10^(-34)Js * 3 * 10^8m/s] / 3 * 10^(-7)m = 6,63 * 10^(-19)J Ek = 6,63 * 10^(-19)J - 3,36 * 10^(-19)J = 3,27 * 10^(-19)J
Dane: W=2,1eV=3,36 *10^-19J [latex]lambda=300mn=300*10^{-9}[/latex] c=300000000m/s=3*10^8m/s h=6,63*10^-34 m=9,1*10^-31 kg Oblicz: Ek=? Rozwiązanie: [latex]p=frac{E}{c}=>E=p*c[/latex] [latex]p=frac{h}{lambda}[/latex] [latex]E=frac{h*c}{lambda}[/latex] [latex]p=frac{E}{c}=>E=p*c[/latex] [latex]p=frac{h}{lambda}[/latex] [latex]E=frac{h*c}{lambda}[/latex] [latex]p=frac{E}{c}=>E=p*c[/latex] [latex]p=frac{h}{lambda}[/latex] [latex]E=frac{h*c}{lambda}[/latex] [latex]E=frac{6,63*10^{-34}*3*10^8}{300*10^{-9}}[/latex] [latex]E=frac{19,89*10^{-26}}{3*10^{-7}}[/latex] [latex]E=6,63*10^{-19}J[/latex] [latex]E=W+Ek[/latex] [latex]Ek=E-W[/latex] [latex]Ek=6,63*10^{-19}-3,36 *10^{-19}[/latex] [latex]Ek=3,27*10^{-19}J[/latex]
