Derive an expression for focal length of a lens in terms of radii of curvature of its surfaces and its refractive index.

Derive an expression for focal length of a lens in terms of radii of curvature of its surfaces and its refractive index.

Derive an expression for focal length of a lens in terms of radii of curvature of its surfaces and its refractive index.

Consider a ray close and parallel to the principal axis, incident at height, h

 

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