Gilley, Frank M · Boston, Allyn & Bacon · leaf 304
.the angle of reflection. 327. Shoaling Effect of Water by Par-allax.— The bottom of a tank or pondlooks nearer the top than it really is.The place at which the bottom appears tobe can be located by the method of paral-lax. A, Pig. 274, is a mark on the bottomof a jar or tank. By closing one eye,… … 294 PRINCIPLES OF PHYSICS. — that is, when A and B move together, — the pin at B isat the level at which the bottom of the jar appears to be. On account of the thickness of the side of the jar, an exactsetting is hard to make. The experiment can be easUy per-formed, however, with a glass plate.…
Physics
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