A text-book of physics, largely experimental. On the Harvard college "Descriptive list of elementary physical experiments." (1891)
Hall, Edwin Herbert, 1855-1938, Bergen, Joseph Y. (Joseph Young), 1851-1917 · New York, H. Holt and Company · leaf 197
. If the ray were represented as coming in the oppositedirection, that is, first along R and then along 7, 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 7 and then along R. 151. Index of… … R R three rays all of which come to the point C and then sepa-rate, the first going along R, the second along R. thethird along R. The circle whose centre is at C is drawnwith any convenient length of radius. The dotted lines, REFRACTION OF LIGHT. i?5 n, n, n, and m, m, m, are drawn from the points…
Physics
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