Hall, Edwin Herbert, 1855-1938 · New York, H. Holt and company · leaf 146
Fig. 97. … It is evident that light entering the face DE from air willbe refracted toward the normal NM. Going through theprism to the face DFit passes out into the air, being re- 134 PHYSICS. fracted again, this time from the normal MN\ so that thetwo refractions have bent the ray far from its…
Physics
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