Elements of natural philosophy (Volume 2-3) (1850)
Bartlett, W. H. C. (William Holms Chambers), 1804-1893 · New York : Barnes · leaf 330
directions, a numberwill always be found perpendicular to each plane pass-ing through the sun or moon, and the eye of the obser-ver. One of these planes is indicated in the Figure. Sm* beins; abeam of light pa- Fig. 90. rallel to S E,drawn through thesun and the eye,and incident uponthe face of a… … Illustration andexplanation; 322 Example first, NATURAL PHILOSOPHY. sini(£+ 60°) = 1,31. sin 30( i S = 40° 55 10 — 30° = 10° 55 10 <S = 21°5020 and Example second; sin i (8 + 90°) = 1,31. sin 45° ^ rT = 67° 52 — 450 = 22° 52^ = 450 44/. Other phenomena of a similar nature will be…
Mechanics · Acoustics · Optics
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