A) 5.65 m
B) 28.25 m
C) 11.30 m
D) 56.51 m
Correct Answer: D
Solution :
Resolving power \[=\frac{1.22\ \lambda }{a}=\frac{1.22\times 6000\times {{10}^{-10}}}{5}\] Also resolving power \[=\frac{d}{D}=\frac{d}{38.6\times {{10}^{7}}}\] \[\therefore \frac{1.22\times 6\times {{10}^{-7}}}{5}=\frac{d}{38.6\times {{10}^{7}}}\] Þ\[d=\frac{1.22\times 6\times {{10}^{-7}}\times 38.6\times {{10}^{7}}}{5}m=56.51\ m\]
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