Carpenter, William Benjamin, 1813-1885, Dallinger, W. H. (William Henry), 1842-1909 · Philadelphia, Blakiston · leaf 50
hod of drawing this is exactly similar to that of thepreceding figure. The rays A F and A H are traced through thelens, and their prolongation backwards (see the dotted lines in thefigure) gives the point C. Also, as in the preceding figure, anypoint of the picture can be found by tracing one ray,… … Fig. 27.—The formation of a virtual image. and B respectively. In mathematical optics it appears as a negativequantity which satisfies an equation, and is asort of metaphysico-mathematical truth. In this case the virtual image is convex towardsthe lens. Fig. 27 illustrates the action of a simple…
Microscopy
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