Kelvi

A biconvex lens has radii of curvature, $20$ cm each. If the refractive index of the material of the lens is $1.5,$ the power of the lens is:

medium

Ray Optics and Optical Instruments

2022

physics

+2D

+20D

+5D

$\infty$

Explanation

To find the power of a biconvex lens, we use the lens maker's formula: $\\ \frac{1}{f} = \left(n - 1\right) \left(\frac{1}{R_1} - \frac{1}{R_2}\right) \\$

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A biconvex lens has radii of curvature, 20 20 20 cm each. If the refractive index of the material of the lens is 1.5, 1.5, 1.5, the power of the lens is:

Explanation

Our AI powered practice platform can help you achieve your doctor dream.

A biconvex lens has radii of curvature, $20$ cm each. If the refractive index of the material of the lens is $1.5,$ the power of the lens is: