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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
PhysicsRay OpticsAP EAMCETAP EAMCET 2020 (07 Oct Special)
Options:
  • A Convergent lens of focal length $3.5 \mathrm{R}$.
  • B Convergent lens of focal length $3.0 \mathrm{R}$
  • C Divergent lens of focal length $3.5 \mathrm{R}$.
  • D Divergent lens of focal length $3.0 \mathrm{R}$
Solution:
2426 Upvotes Verified Answer
The correct answer is: Convergent lens of focal length $3.5 \mathrm{R}$.
No solution. Refer to answer key.

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