A) - 4 cm
B) 8 cm
C) 6 cm
D) 12 cm
Correct Answer: A
Solution :
m = ± 3 and f = ? 6 cm Now \[m=\frac{f}{f-u}\,\,\,\Rightarrow \,\,\pm 3=\frac{-\,6}{-6-u}\] For real image \[-\,3=\frac{-\,6}{-6-u}\] Þ \[u=-\,8\,cm\] For virtual image \[3=\frac{-\,6}{-6-u}\] Þ \[u=-\,4\,cm\]You need to login to perform this action.
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