Gilley, Frank M · Boston, Allyn & Bacon · leaf 299
osite long edge and theground edge (Fig.265). Notice thatthe inner surface ofthe ground glass edgelooks dark. Turnthe plate slowly, soas to look more alongthe edge, BC, Fig.266, in the directionof the arrow. Theedge looks brightfrom C up to thepoint X, where theimage of the cornerL is seen. Move… … Fig. 265. LIGHT. — REFRACTION. 289 N-- book. Mark the outline, and letter as in the figure. Draw a line from L to x. At x erect Nx perpendicular to BC. In ^ the angle, Lx^, write: This is the greatest angle a ray can make with the perpendicular to the surface of the glass and yet be refracted and…
Physics
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