A) 13.3 cm
B) 20 cm
C) 25 cm
D) 10 cm
Correct Answer: D
Solution :
\[u=-20\,\,cm,\,\,f=20\,\,cm\] From mirror formula \[\frac{1}{f}=\frac{1}{v}+\frac{1}{u}\] \[\frac{1}{20}=\frac{1}{v}+\frac{1}{-20}\] \[\frac{1}{v}=\frac{1}{20}+\frac{1}{20}\] \[\frac{1}{v}=\frac{2}{20}=v=10\,\,cm\]You need to login to perform this action.
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