The radii of curvature for a thin convex lens are 10 cm and 15 cm respectively. The focal length of the lens is 12 cm. The refractive index of the lens material is

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Aicharya · Accepted Answer

$\begin{aligned} & \frac{1}{\mathrm{f}}=(\mu-1)\left(\frac{1}{\mathrm{R}_1}-\frac{1}{\mathrm{R}_2}ight) \ & \frac{1}{12}=(\mu-1)\left(\frac{1}{10}-\frac{1}{-15}ight) \ & \frac{1}{12}=(\mu-1)\left(\frac{3+2}{30}ight) \ & \mu=\frac{3}{2}\end{aligned}$

The radii of curvature for a thin convex lens are 10 cm and 15 cm respectively. The focal length of the lens…

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