The clinical use of prisms; and the decentering of lenses (1893)
Maddox, Ernest Edmund, 1860-1933 · Bristol : J. Wright ; London : Simpkin, Marshall, Hamilton, Kent · leaf 17
from itsformer course, of a ray of light as it enters (otherthan perpendicularly) the surface of a rarer ordenser medium. The body of a prism does notrefract light, since rays travel through its sub-stance in straight lines. It is only as they enter orleave the prism, and thus pass from one medium… … Angle of Refraction.—We have seen that the twoplane faces of a prism are made to slope towardseach other so as to contain between them a mode-rate angle. This angle is called the angle ofrefraction, because the total effect of the prismon the direction of a ray of light depends on thesize of this…
Lenses
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