Johnson's natural philosophy and key to philosophical charts : illustrated with 500 cuts; being reduced photographic copies of all the diagrams contained in the author's philosophical series of indestructible school charts ; for the use of schools and families (1878)
the point ofincidence, L, and draw the line H, from the intersection of the circleand incident ray, so it will fall perpendicular to the normal NL; andalso the line T, perpendicular to the normal. The line, H, is the sine of the angle of incidence ; and the line T, thesine of the angle of… … OPTICS. 219 The index of refraction varies with different media. For light passingfrom air into water, it is about |; from air into glass, f; from air intodiamond, f. These fractions inverted will, of course, express the indexof refraction for light passing out of water, glass, and diamond, into…
Physics · Astronomy
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