A plano convex lens of refractive index μ 1 and focal length f 1 is kept in contact with another plano concave lens of refractive index μ 2 and focal length f 2 . If the radius of curvature of their spherical faces is R each and f 1 = 2f 2 , then μ 1 and μ 2 are related as :
Text Solution
Verified by ExpertsThe correct answer is:
A
⇒ 
⇒ 2 μ 1 – 2 = μ 2 – 1
⇒ 2 μ 1 – μ 2 = 1
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