How does a lens make an image?
Read OriginalThis article provides a detailed mathematical derivation of how a lens forms an image, starting from Maxwell's equations and progressing through the Helmholtz equation and scalar diffraction theory. It covers the Green's function for light propagation, the role of refractive index, and the assumptions needed for image formation. The content is highly technical, involving vector calculus and wave optics, aimed at readers with a strong physics or engineering background.
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