Question

A plano convex lens of refractive index μ₁ and focal length f₁ is kept in contact with another plano concave lens of refractive index μ₂ and focal length f₂. If the radius of curvature of their spherical faces is R each and f₁ = 2f₂, then μ₁ and μ₂ are related as:
(A) μ₁ + μ₂ = 3 (B) 2μ₁ + μ₂ = 1
(C) 3μ₂ + μ₁ = 1 (D) 2μ₂ + μ₁ = 1

Answer 1

Answer:

2μ1−μ2=1

Explanation:

picture.hope it helps