Question

In the given figure, the radius of curvature of curved surface for both the plano-convex and plano-concave lens is 10 cm and refractive index for both is 1.5. The location of the final image after all the refractions through lenses is

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A

15 cm

B

20 cm

C

25 cm

D

40 cm

Hard
Updated on : 2022-09-05
Solution
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Correct option is B)

The focal length of the plano - convex lens is:  
Focal length of plano - concave lens is:
since parallel beams are incident on the lens, its image from plano - concave lens will be formed at from it (at the focus) and will act as an object for the plano - concave lens. since the two lens are at a distance of from each other, therefore, for the next lens

Hence, the correct option is

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