Question

Two equi-convex lenses each of focal lengths 20 cm and refractive index 1.5 are placed in contact and space between them is filled with water of refractive index 4/3. The combination works as :

A

converging lens of focal length 50 cm.

B

diverging lens of focal length 15 cm

C

converging lens of focal length 15 cm

D

diverging lens of focal length 50 cm

Medium
Solution
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Correct option is C)





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