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JEE MAIN 2021
16-03-2021 S2
Question
The refractive index of a converging lens is 1.4 . What will be the focal length of this lens if it is placed in a medium of same refractive index? (Assume the radii of curvature of the faces of lens are $R_1$ and $R_2$ respectively)
Select the correct option:
A
1
B
Infinite
C
$\frac{R_1 R_2}{R_1-R_2}$
D
Zero
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Solution
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Question Tags
JEE Main
Physics
Easy
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