A) 50 cm
B) 25 cm
C) 12.5 cm
D) 100 cm
Correct Answer: B
Solution :
[b] The image will be formed by the plane mirror at a 30 cm behind it, while the image by convex mirror will be formed at 10 cm behind the convex mirror. Since for convex mirror \[u=-\,50cm\] \[v=10\,cm\] \[\frac{1}{f}=\frac{1}{-\,50}+\frac{1}{10}=\frac{-1+5}{50}=\frac{4}{50}\] \[f=\frac{50}{4}=12.5\,cm\] Therefore the radius of curvature of convex mirror is \[r=2f=25\,cm\]You need to login to perform this action.
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