Astiverson354 Astiverson354
  • 23-01-2024
  • Physics
contestada

A double convex lens is made of glass of refractive index 1.55 with both faces of the same radius of curvature. find the radius of curvature required if focal length is 20 cm
a) 22 cm
b) 18 cm
c) 25 cm
d) 30 cm

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