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AP EAMCET201726 Apr 2017Evening ShiftPhysicsRay OpticsActual

A plano convex lens of material of refractive index ₁ exactly fits into a plano concave lens of material of refractive index ₂ . If R is the radius of curvature of the curved surfaces of the lenses and the plane surfaces of the lenses are parallel, the focal length of the combination is

Options

  1. Aaligned & R ( ₁- ₂ ) aligned
  2. Baligned & R ₁- ₂ aligned
  3. Caligned & ₁- ₂ R aligned
  4. Daligned & 1 R ( ₁- ₂ ) aligned

Correct answer

B. aligned & R ₁- ₂ aligned

Step-by-step solution

No solution. Refer to answer key.

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