A plano-convex lens is made of a material wit | vedclass

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(B) The focal length $f$ of a lens is given by the Lens Maker's Formula: $\frac{1}{f} = (\mu - 1) \left( \frac{1}{R_1} - \frac{1}{R_2} \right)$.For a

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$100$

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(B) The focal length $f$ of a lens is given by the Lens Maker's Formula: $\frac{1}{f} = (\mu - 1) \left( \frac{1}{R_1} - \frac{1}{R_2} \right)$.For a plano-convex lens,one surface is plane $(R_1 = \infty)$ and the other is curved ($R_2 = -R = -60 \ cm$ using sign convention).Substituting the values: $\frac{1}{f} = (1.6 - 1) \left( \frac{1}{\infty} - \frac{1}{-60} \right)$.$\frac{1}{f} = (0.6) \left( 0 + \frac{1}{60} \right) = \frac{0.6}{60} = \frac{1}{100}$.Therefore,$f = 100 \ cm$.

$A$ plano-convex lens is made of a material with a refractive index of $1.6$. The radius of curvature of the curved surface is $60 \ cm$. The focal length of the lens is.....$cm$.

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