Gilley, Frank M · Boston, Allyn & Bacon · leaf 294
the indexof refraction of water ^, or 1.33, draw the path of a ray strik-ing the surface in air at 45°. Anangle of 45° is easily drawn byfolding a sheet of paper, startingthe crease at a corner, and jnakingthe adjacent edges meet. DrawOF, Fig. 259, making the angleNFC = 4:5°. This we will callthe… … 284 PBINCIPLE8 OF PHYSICS. the lower arc of tlie circle shown in Fig. 259, find the point,H, from which a perpendicular drawn to FM is equal to threeof the parts of CD. Draw FH, the ray after refraction. Callthe angle, HFF, the angle of refraction, r. Problems. 1. Find, by drawing, the direction of…
Physics
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