Brewster, David, Sir, 1781-1868, Bache, A. D. (Alexander Dallas), 1806-1867 · Philadelphia : Lea and Blanchard · leaf 21
be drawn perpendicular toM N, A N will be equal to A N. Hence the rays will havethe same divergency after reflexion as they had before it. Ifwe consider A D D as a divergent beam of light includedbetween A D and A D, then the reflected beam includedbetween D B and D B will diverge from A, and will… … mirror, M N, they will be reflected in directions D B, D B,D B, forming the same angles with the perpendiculars D E,D E, D E, as the incident rays did, and converging to a pointB as far before the mirror as the point B is behind it. If weconsider A D D A as a converging beam of light, D B Dwill be…
Optics
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