Wright, Mark R., 1854- · London : Longmans · leaf 119
ed the index of refraction for air and water j from air to glass it is -^. 2 The laws of refraction are :— I. The incident ray, the refracted ray, and the normal are in one plane. 2. The number ob-tained, by dividing thesine of the angle of in-cidence, by the sine ofthe angle of refraction,is the… … Fig. go.
Physics
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