Question

A thin convex lens is made of a material of refractive index $1.6$. An object is kept at a distance of $u$ from the lens on the principal axis as shown in the figure. The radius of curvature of the surfaces are $10cm$ and $5cm$. Now, the lens is reserved such that the face having radius of curvature $5cm$ lies close to the object. The difference in image position as obtained for both the cases in equal to

• A. $0.4u$
• B. $0.6u$
• C. $0.8u$
• D. none of these

Answer 1

Answer: (D)

none of these

Focal length does not change with the reversal of lens.