A high-school astronomy: in which the descriptive, physical, and practical are combined .. (1859)
Mattison, Hiram, 1811-1868 · New York, Mason brothers · leaf 223
and departure are alwaysequal. Let AB represent the polished metallic sur-face. C the source of light, and the arrows thedirection of the ray. Then D would representthe angle of incidence or contact, and E the angleof reflection or departure—which angles are seento be equal. 503. W^hat articles… … REFLECTION OF LIGHT. 219 506. A concave mirror reflects parallel rays back to afocus, the distance of which is equal to half the radiusof the sphere formed by the concave surface produced. REFLECTION BY A CONCAVE MIEROR.
Astronomy
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