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 32
) is slightly more thanhalf the refracting angle of the prism, if it bea weak prism, and increasingly more than half asthe refracting angle increases. In Fig. 11 a ray (ef)is seen traversing a prism. On entering the glass SIMPLEST OPTICAL PROPERTIES. 17 it is bent towards the normal (n), and on… … Fig. 11.—Refraction by a prism. The angle d contained between the forward pro-longation of the entering ray (e\ and the backwardprolongation of the emergent ray (/) is thedeviating angle, or, shortly, the deviation of theprism. The amount of deviation suffered by a rayis the same, whatever part of…
Lenses
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