A) 8 mm
B) 6 mm
C) 4 mm
D) 3 mm
Correct Answer: B
Solution :
\[\frac{{{\lambda }_{1}}}{{{\lambda }_{2}}}=\frac{{{n}_{2}}}{{{n}_{1}}}=\frac{12000}{10000}=\frac{6}{5}\] \[x=\frac{{{m}_{1}}{{\lambda }_{1}}D}{d}=\frac{5\times 12000\times {{10}^{-10}}\times 2}{2\times {{10}^{-3}}}=6\,mm\]You need to login to perform this action.
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