simple microscope A single double-convex lens with a short focal length. Examples of this instrument include a magnifying glass or reading lens. Related MicroscopyU Article Geometrical Construction of Ray Diagrams A popular method of representing a train of propagating light waves involves the application of geometrical optics to determine the size and location of images formed by a lens or multi-lens system. This tutorial explores how two representative light rays can establish the parameters of an imaging scenario.
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