A) 1.0 mm
B) 0.1 mm
C) 0.05 mm
D) 0.01 mm
Correct Answer: B
Solution :
\[d=\frac{D\lambda }{\beta }=\frac{1\times 5\times {{10}^{-7}}}{5\times {{10}^{-3}}}={{10}^{-4}}m=0.1\ mm\].
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