A) \[5cm\]
B) \[12cm\]
C) \[10cm\]
D) \[20cm\]
Correct Answer: B
Solution :
Image is virtual so m = + 3. and \[f=\frac{R}{2}=18\ cm\] So from \[m=\frac{f}{f-u}\Rightarrow 3=\frac{(-18)}{(-18)-u}\]\[\Rightarrow u=-\ 12\ cm.\]You need to login to perform this action.
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