A) \[+1\,D\]
B) \[-2\,D\]
C) \[+\,3\,D\]
D) \[+\,4\,D\]
Correct Answer: D
Solution :
\[f=\frac{R}{(\mu -1)}=\frac{15}{(1.6-1)}=25\,cm\] \[\therefore P=\frac{100}{f}=\frac{100}{25}=+\,4\,D\]You need to login to perform this action.
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