Gilley, Frank M · Boston, Allyn & Bacon · leaf 291
much greater thanfrom a nearer point of view, and the bottom of the pondappears but very little below the surface. Some distanceaway from the shore the water may be deeper than near theshore, and yet look shallower. Wind paper around the jar (Fig. 254). With the head a Fig. 254. 280 PRINCIPLES OF… … Fig 255. 312. Critical Angle. — A ray of light that enters or leaves the surface of water in a perpendicular, or normal, direction isnot bent. The ray, NF, Fig. 255,would continue as FK after enteringthe water. The greater the anglethat the ray makes with the normalFK, the more it will be refracted…
Physics
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