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The aperture diameter of a plano-convex lens is 6 cm and its thickness is 3 mm . If the speed of light through its material is v=2 10^8 ~m / s , the focal length of the lens is

Options

  1. A40 cm
  2. B35 cm
  3. C30 cm
  4. D20 cm

Correct answer

C. 30 cm

Step-by-step solution

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