The microscope : its construction and management : including technique, photo-micrography, and the past and future of the microscope (1893)
Heurck, Henri van, 1838-1909 · London : C. Lockwood ; New York : D. Van Nostrand Co. · leaf 24
which thus reduces the laws ofreflection for curved mirrors to those forplane mirrors (fig. 4).Let us suppose the luminous rays E F, G H, / J, K L, parallel toone another and to the principal axis, to fall on the mirror; theywill make, with the normals (which will then be the radii C F, C H,C J, C… … REFLECTION. This, however, only holds good for mirrors which are but a small segmentof a sphere when the angle A B C is but a few degrees in magnitude. Let us now consider the triangle C F O : by the laws ofgeometry the angle F C O is equal to the angle C F E, being alter-nate angles with respect…
Microscopy
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