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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