A high-school astronomy: in which the descriptive, physical, and practical are combined .. (1859)
Mattison, Hiram, 1811-1868 · New York, Mason brothers · leaf 217
485. When lightpasses obliquelyfrom a denser to ararer medium, asfrom water into air,it is refracted froma perpendicular to-ward a horizontal. Here the lamp A shines upthrough water into air. Theray that strikes the surface per-pendicularly passes on to Bwithout being refracted; butthe other rays…
Astronomy
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