A) \[75\mu m\]
B) \[100\mu m\]
C) \[25\mu m\]
D) \[50\mu m\]
Correct Answer: C
Solution :
[c] |
\[a\,\,\sin \theta =\lambda \] |
\[\sin 30{}^\circ =\frac{\lambda }{a}\] \[(a=1\mu m)\] |
\[\Rightarrow \lambda =\frac{a}{2}=\frac{1}{2}\mu m\] |
\[\beta =\frac{\lambda D}{d}=1\times {{10}^{-2}}\] |
\[=\frac{\frac{1}{2}\times {{10}^{-6}}\times 50\times {{10}^{-2}}}{d}=1\times {{10}^{-2}}\] |
\[\Rightarrow d=25\mu m\] |
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