A. \(1,8744\mu m\)
B. \(0,1702\mu m\)
C. \(0,2793\mu m\)
D. \(1,1424\mu m\)
A
Ta có: \(\left\{ \begin{array}{l}{\lambda _{ML}} = {\lambda _{32}} = 0,6563\mu m\\{\lambda _{NL}} = {\lambda _{42}} = 0,4861\mu m\\{\lambda _{NM}} = {\lambda _{43}} = ?\end{array} \right.\)
Có: \(\frac{1}{{{\lambda _{42}}}} = \frac{1}{{{\lambda _{43}}}} + \frac{1}{{{\lambda _{32}}}}\\ \Rightarrow \frac{1}{{{\lambda _{43}}}} = \frac{1}{{{\lambda _{42}}}} - \frac{1}{{{\lambda _{32}}}} = \frac{1}{{0,4861}} - \frac{1}{{0,6563}} \\\Rightarrow {\lambda _{43}} = 1,8744\mu m\)
\( \Rightarrow \frac{1}{{{\lambda _{43}}}} = \frac{1}{{0,4861}} - \frac{1}{{0,6563}} \\\Rightarrow {\lambda _{43}} = 1,8744\mu m\)
Chọn A.
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