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Lens Maker's Formula

$\frac{1}{f} = \left(\frac{n_2}{n_1} - 1\right) \left(\frac{1}{R_1} - \frac{1}{R_2}\right)$

This formula is used to calculate the focal length of a lens based on its refractive index and the radii of curvature of its surfaces.

Focal length of the lens

$n_1$

Refractive index of the medium

$n_2$

Refractive index of the lens material

$R_1$

Radius of curvature of the first surface

$R_2$

Radius of curvature of the second surface

The lens maker's formula relates the focal length of a lens to its physical characteristics and the refractive index of the material.

Designing lenses for glasses, cameras, and microscopes.

Lenses

Optics

1 of 5.

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