A) 1.67 cm
B) 1.5 cm
C) 0.5 cm
D) 5.0 cm
Correct Answer: B
Solution :
\[{{x}_{n}}=2n\left( \frac{D\lambda }{2d} \right)\therefore {{x}_{3}}=2\times 3\left( \frac{D\lambda }{2d} \right)\] \[=\frac{3\times 200\times 5000\times {{10}^{-8}}}{0.2\times {{10}^{-1}}}=1.5\,cm.\] Hence, the correction option is [b].You need to login to perform this action.
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