Laurence, Lionel · London, School of Optics · leaf 84
hen S Q Q will be parallel to it after refraction.The latter produced back cuts the axis in/2, which is the image of 8. The distance a (Fig. 75) between the ray and the principal axis in therefracting plane is equal to the sum of b and d, the distances between the rayand the axis in, respectively,… … Construction of Image—Cc. Surface.—The rays (a) and (b) as given fora Cx. serve also for a Cc. surface, but (b) diverges. A B is the object (Fig. 77). Draw A G; this, after refraction, diverges asif proceeding from F2. Draw A C through 0, whose direction is unchanged REFRACTION BY CURVED SURFACES…
Optics
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