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A double convex lens of the objective is changed to plano-convex. The objective is made of a plastic material with refractive index 1.3. Then,

Options

  1. Athe numerical aperture of the double convex lens is 1.3 .
  2. Bthe numerical aperture of the plano-convex lens is 0.39 .
  3. Cthe diameter to focal length ratio of the plano-convex lens is 1.2 .
  4. Dthe critical angle of the double convex lens is 60^ .

Correct answer

B. the numerical aperture of the plano-convex lens is 0.39 .

Step-by-step solution

No solution available.

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