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Most Important Selected Qs for JEE AdvancedPhysicsRay Optics

A biconvex lens of focal length f and radii of curvature of both the surfaces R is made of a material of refractive index n₁ . This lens is placed in a liquid of refractive index n₂ . Now this lens will behave like

Options

  1. Aeither as a convex or as a concave lens depending solely on R
  2. Ba convex lens depending on n₁ and n₂
  3. Ca concave lens depending on n₁ and n₂
  4. Da convex lens of same focal length irrespective of R, n₁ and n₂

Correct answer

C. a concave lens depending on n₁ and n₂

Step-by-step solution

The lens will behave like a convex lens or a concave lens depending upon the value of n₁ and n₂ .

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