Elementary treatise on physics, experimental and applied : for the use of colleges and schools (1906)
Ganot, A. (Adolphe), 1804-1887, Atkinson, Edmund, 1831-1901, Reinold, A. W. (Arnold William), 1843-1921 · New York : Wood · leaf 560
the mirror, is the aperture. A principal section is the section made by aplane through its principal axis. In speaking of mirrors those lines alonewill be considered which lie in the same principal section. 535. Reflection from a concave spherical mirror.—We shall first take thecase when the object…
Physics
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