A concave lens of glass, refractive index 1.5 has both surfaces of same radius of curvature $R$. On…

A concave lens of glass, refractive index 1.5 has both surfaces of same radius of curvature $R$. On immersion in a medium of refractive index 1.75 , it will behave as a
  1. Convergent lens of focal length $3.5 \mathrm{R}$.
  2. Convergent lens of focal length $3.0 \mathrm{R}$
  3. Divergent lens of focal length $3.5 \mathrm{R}$.
  4. Divergent lens of focal length $3.0 \mathrm{R}$

Solution

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Asked in: AP EAMCET 2020 (07 Oct Special)

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