Derivation of Lens Maker Formula?
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Let us consider the thin lens shown in the image above with 2 refracting surfaces having the radii of curvatures R1 and R2 respectively.
Let the refractive indices of the surrounding medium and the lens material be n1 and n2 respectively.
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Lenses of different focal lengths are used for various optical instruments. The focal length of a lens depends upon the refractive index of the material of the lens and the radii of curvatures of the two surfaces. The derivation of lens maker formula is provided here so that aspirants can understand the concept more effectively. Lens manufacturers commonly use the lens maker formula for manufacturing lenses of the desired focal length.
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