Optics 3 Question 8
8. A plano-convex lens of refractive index and focal length is kept in contact with another plano-concave lens of refractive index and focal length . If the radius of curvature of their spherical faces is each and , then and are related as
(2019 Main, 10 Jan I)
(a)
(b)
(c)
(d)
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Answer:
Correct Answer: 8. (c)
Solution:
- Given,
Using lens Maker’s formula, we get
[ usingEq. (i)]