A) 6 cm
B) 6.3 cm
C) 20 cm
D) 60 cm
Correct Answer: A
Solution :
Full use of resolving power means whole aperture of objective in use. And for relaxed vision. \[\frac{{{f}_{o}}}{{{f}_{e}}}=\frac{D}{d}\]\[\Rightarrow \frac{300}{{{f}_{e}}}=\frac{15}{0.3}\Rightarrow {{f}_{e}}=6\ cm\]You need to login to perform this action.
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