Discoveries and inventions of the nineteenth century (1905)
Routledge, Robert · London : G. Routledge and Sons · leaf 448
face, A B, then we may say that the ray in pass-ing from the rarer medium (water, air, &c.) into the denser medium (glass,&c.) is bent towards the perpendicular, or normal, as at O; but that onleaving the denser to enter the rarer medium, ai at R, it is bent away fromthe perpendicular. In… … incident ray, T O, and the refracted ray, O R, are all in the same plane.Besides, there is the important and interesting law discovered by Snell andlay Descartes, which may thus be explained with reference to Fig. 203. Onthe incident and refracted rays, T o and o R, let us suppose that any…
Inventions
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