Questions
A plano convex lens of focal length 120 cm has a convex surface of radius of curvature 50 cm. The refractive index of the lens is
detailed solution
Correct option is C
1f=(μ−1)1R ⇒1120=(μ−1)150 ⇒512=μ−1 μ=512+1=1712=1.4cmTalk to our academic expert!
Similar Questions
A plano convex lens fits exactly into a plano concave lens. Their plane surfaces are parallel to each other. If lenses are made of different materials of refractive indices and and R is the radius of curvature of the curved surface of the lenses, then the focal length of the combination is
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