Well's natural philosophy : for the use of schools, academies and privte students, introducing the latest results of scientific discovery and research ; arranged with special reference to the practical application of physical science to the arts and the experiences of everyday life ; with three hundred and seventy-five engravings (1873)
Wells, David A · New York : Ivison, Blakeman, Taylor and Co. · leaf 318
of light may bestated as follows ; What laws srov- Whcu light passcs from one medium intotion*/u-Mr another, in a direction perpendicular to thesurface, it continues on in a straight line, with-out altering its course. When light passes obliquely froma rarer into a denser medium, it is refracted… … Fig. 251.
Physics · Science · Technology
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