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Manipal MET2018PhysicsRay Optics

A plano-convex lens is made of refractive index of 1.6. The radius of curvature of the curved surface is 60 cm . The focal length of the lens is

Options

  1. A400 cm
  2. B200 cm
  3. C100 cm
  4. D50 cm

Correct answer

C. 100 cm

Step-by-step solution

aligned 1 f & =( -1) [ 1 R₁ - 1 R₂ ] & =(1.6-1) [ 1 60 - 1 ]= 1 100 f & =100 ~cm aligned

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