WBJEE · Physics · Ray 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 \(n_{1}\). This lens is placed in a liquid of refractive index \(n_{2}\). Now this lens will behave like
- A either as a convex or as a concave lens depending solely on \(\mathrm{R}\)
- B a convex lens depending on \(n_{1}\) and \(n_{2}\)
- C a concave lens depending on \(n_{1}\) and \(n_{2}\)
- D a convex lens of same focal length irrespective of \(R, n_{1}\) and \(n_{2}\)
Answer & Solution
Correct Answer
(C) a concave lens depending on \(n_{1}\) and \(n_{2}\)
Step-by-step Solution
Detailed explanation
The lens will behave like a convex lens or a concave lens depending upon the value of \(n_{1}\) and \(n_{2}\).
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