Physics · 2020
JEE Main · 7 January 2020, Shift 2 · Q16
A thin lens made of glass (refractive index =1.5) of focal length f=16 cm is immersed in a liquid of refractive index 1.42. If its focal length in…
A thin lens made of glass (refractive index $\displaystyle =1.5)$ of focal length $\displaystyle f=16 \mathrm{~cm}$ is immersed in a liquid of refractive index 1.42. If its focal length in liquid is $\displaystyle f_l$, then the ratio $\displaystyle f_l / f$ is closest to the integer :
Official answer
(2)
$\displaystyle 9$
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JEE Main 2020 Physics question, with the answer from NTA’s final answer key. Where our answers come from.