In the figure, an air lens of radii of curvature 10cm(R1 = R2= 10cm) is cut in a cylinder of glass (µ = 1.5). The focal length and the nature of the lens is

Question:

In the figure, an air lens of radii of curvature 10cm(R₁ = R₂= 10cm) is cut in a cylinder of glass (µ = 1.5). The focal length and the nature of the lens is

Options :

(a) -15 cm , concave
(b) 15 cm, canvex
(c) ∞, neither concave nor convex
(d) 0, concave

Answer :

(a) -15 cm , concave

Answer Steps :

step 1

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