Ta có \(A = \dfrac{{hc}}{{{\lambda _0}}}\\ \Rightarrow {\lambda _0} = \dfrac{{hc}}{A} = \dfrac{{6,{{625.10}^{ - 34}}{{.3.10}^8}}}{{3,55.1,{{6.10}^{ - 19}}}} \\= 0,{35.10^{ - 6}}m = 0,35\mu m\)\({\lambda _0} = \dfrac{{hc}}{A}\)
Ta có \({\lambda _0} = \dfrac{{hc}}{A}\)
Lấy ln hai vế: Lấy đạo ln hai vế: \(\ln {\lambda _0} = \ln (hc) - \ln A\)
Lấy đạo hàm hai vế: \(\dfrac{{\Delta {\lambda _0}}}{{{\lambda _0}}} = \dfrac{{\Delta A}}{A}\\ \Rightarrow \Delta {\lambda _0} = \dfrac{{\Delta A}}{A}.{\lambda _0}\\ = \dfrac{{0,01}}{{3,55}}.0,35 = 0,001\mu m\)
Vậy \({\lambda _0} = 0,350 \pm 0,001(\mu m)\)
