Hall, Edwin Herbert, 1855-1938 · New York, H. Holt and company · leaf 139
on. If the ray were represented as coming in the oppositedirection, that is, first along R and then along /, r wouldbe the angle of incidence and i would be the angle of re-fraction. The ray would be bent just as much at the sur-face as it is when going first along / and then along R. 128. Index of… … three rays all of which come to the point 0 and then sep-arate, the first going along i2, the second along i?, thethird along R. The circle whose centre is at C is drawnwith any convenient length of radius. The dotted lines,w, n\ n\ and m, m\ m9 are drawn from the points wherethe rays cut the…
Physics
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