Austin, Louis W. (Louis Winslow), 1867-1932, Thwing, Charles B. (Charles Burton), 1860-1946, joint author · Boston, Allyn and Bacon · leaf 124
bstance for air is theratio of the velocity of light in air to its velocity in thegiven substance. If i (see Fig. 56) be the angle whichthe incident ray makes with the normal to the bounding LIGHT. Ill surface while the ray is in air, r the angle made by therefracted ray, and D the total de-viation… … Fig. 56, n = sin i __ sin i (Z> + A) sm r sin i A ?L To measure i), illuminate the slit with sodium lightby placing before it a Bunsen burner, in which a platinumspoon is placed containing a little sodiumsalt. Point the telescope at the slit, andnote the reading of the verniers a1. Thenplace the…
Physics
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