 | James Wood - 1801 - 270 pages
..., and alfo, A.*~B, the angle of deviation, inPROP. XVIII. ' ioi . A ray of light cannot pafs out of a denser into a rarer medium if the angle of incidence exceed a certain, limit. Let a ray of light AB be incident upon the furface EBF of a rarer medium, and refracted... | |
 | 1854 - 470 pages
...objects as the one in question are illuminated by oblique light ; for a ray of light cannot pass out of a denser into a rarer medium if the angle of incidence exceed a certain limit, and this limit is different in substances of different refractive powers. Thus all... | |
 | 1854 - 472 pages
...objects as the one in question are illuminated by oblique light ; for a ray of light cannot pass out of a denser into a rarer medium if the angle of incidence exceed a certain limit, and this limit is different in substances of different refractive powers. Thus all... | |
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... refractive power — whilst it passes freely through the other, they will then become perfectly distinguishable, the one appearing dark, the other light. This is what seems to take place when such objects as the one in question are illuminated by... 