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Please solve this question number is 125 and 126.hurry up my friends

Please solve this question number is 125 and 126.hurry up my friends

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Grade:12th pass

1 Answers

Eshan
askIITians Faculty 2095 Points
5 years ago
Dear student,

From refraction at curved surface relation,
\dfrac{\mu_2}{v}-\dfrac{\mu_1}{u}=\dfrac{\mu_2-\mu_1}{R}
For light ray coming from infinity, the image is formed at focus. Hence

\dfrac{4/3}{f}-\dfrac{1}{-\infty}=\dfrac{\dfrac{4}{3}-1}{0.1}
\implies \dfrac{1}{f}=2.5D

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