TY - JOUR AU - Naylor, J. P. AB - i i PIG. 2. MEASURING THE INDEX OF REFRACTION OF A GLASS PRISM. P. NAYLOR, M.S., Professor of Physics, DePamu University. A simple adaptation of Descartes’ method for measuring the mean index of refraction of a glass prism has been used so successfully in the elementary classes at Mihshall Laboratory that it is thought that it might be worth while to explain the method used to the readers of SCHOOL SCIENCE AND MATHEMATICS. This arrangement of the experiment has the advantage that it does not require an expensive spectrometer but only such simple apparatus as is found in every laboratory, and the principles involved are applied so directly that the student does not lose sight of them in the manipulation of a complex piece of appa- BY J. ratus. INDEX OF REFRACTION OF GLASS In the method of Descartes it is required that the light fall perpendicular on one side of the prism. The simple formula expressing the relation between the index of refraction, the angle of the prism, and the deviation of the ray by the prism may be found as follows: Let ABC, Fig. i, be a prism and HOS the trace of a ray of TI - MEASURING THE INDEX OF REFRACTION OF A GLASS PRISM JF - School Science and Mathematics DO - 10.1111/j.1949-8594.1910.tb03194.x DA - 1910-11-01 UR - https://www.deepdyve.com/lp/wiley/measuring-the-index-of-refraction-of-a-glass-prism-7DHOxppw0E SP - 698 VL - 10 IS - 8 DP - DeepDyve ER -