AP EAMCET · PHYSICS · Ray Optics
When a convex lens is immersed in a liquid of refractive index equal to \(80 \%\) of the refractive index of the material of the lens, the focal length of the lens increases by \(100 \%\). The refractive index of the liquid is
- A 1.27
- B 1.2
- C 1.33
- D 1.4
Answer & Solution
Correct Answer
(B) 1.2
Step-by-step Solution
Detailed explanation
When convex lens placed in air, \(\frac{1}{\mathrm{f}_{\mathrm{a}}}=\left(\mu_1-1\right)\left(\frac{1}{\mathrm{R}_1}-\frac{1}{\mathrm{R}_2}\right)\) ...(i) When convex lens immersed in medium,…
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