A bi-convex lens has radius of curvature of both the surfaces same as 1/6 cm. If this lens is required to be r…

Question

A bi-convex lens has radius of curvature of both the surfaces same as $$\frac{1}{6} \, cm$$. If this lens is required to be replaced by another convex lens having different radii of curvatures on both sides $$\left(R_1 
eq R_2ight)$$, without any change in lens power then possible combination of $$R_1$$ and $$R_2$$ is:

Accepted Answer

A. $$\frac{1}{5} \, cm$$ and $$\frac{1}{7} \, cm$$

Answer

B. $$\frac{1}{3} \, cm$$ and $$\frac{1}{7} \, cm$$

Answer

C. $$\frac{1}{6} \, cm$$ and $$\frac{1}{9} \, cm$$

Answer

D. $$\frac{1}{3} \, cm$$ and $$\frac{1}{3} \, cm$$

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