Question: In a convenient form of the thin-lens equation used by Newton, the object and image distances are measured from the focal points. Show that if

In a convenient form of the thin-lens equation used by Newton, the object and image distances are measured from the focal points. Show that if x = s – f and x’ = s’ – f, the thin-lens equation can be written as xx’ = f2, and the lateral magnification is given by m = –x’/f = –f/x. Indicate x and x’ on a sketch of a lens.


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