#46. To determine the geometrical image of apoint seen by direct refraction through a plate. Let P (fig. 60) be the point, ABSR the plate. DrawPAB normal to the plate. Let q be thegeometrical image of P formed byrefraction at the upper surface, then The rays in the plate are divergingfrom q and… … Fig. 60. AQ = £Q-a = AP + --a..^P_Bfc±!>. 45-46] REFRACTION AT PLANE SURFACES. 81 Thus the virtual image Q seen through the plate is nearerto the plate than the object P, the distance between the objectand image being a (p. — This can be verified experimentally thus : Place a block ofglass on…
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