Question

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

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A

B

C

D

Medium
Updated on : 2022-09-05
Solution
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Correct option is D)

using formula 
calculating focus in second case
The focus of lens
doen't change by reversing
its orientation.
So the difference in image position=0
Hence option ' is correct.

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