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  4. Choose the correct ray diagram of a thin equi-convex lens which is cut as shown in the figure.

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Q. Choose the correct ray diagram of a thin equi-convex lens which is cut as shown in the figure.

NTA AbhyasNTA Abhyas 2022

Solution:

For upper segment,
$\frac{1}{f}=\frac{\mu - 1}{R}$
For lower segment,
$\frac{1}{f}=\frac{2 \left(\mu - 1\right)}{R}$