A) Convex mirror of focal length 10 cm
B) Concave mirror of focal length 40 cm
C) Concave mirror of focal length 60 cm
D) Concave mirror of focal length 10 cm
Correct Answer: A
Solution :
\[\frac{1}{F}=\frac{2}{f}+\frac{1}{{{f}_{m}}}\]. Here \[{{f}_{m}}=\infty \], hence \[F=\frac{f}{2}=10\,cm\]You need to login to perform this action.
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