Elements of natural philosophy (Volume 2-3) (1850)
Bartlett, W. H. C. (William Holms Chambers), 1804-1893 · New York : Barnes · leaf 91
d the sine of the Rule.angle of incidence is equal to the sine of the angle of re-fraction multiplied into the ratio obtained by dividingthe velocity before incidence by that after refraction. 32 NATURAL PHILOSOPHY. Application toair and water; Illustration; Thus, if sound proceed through the… … A^ Example; sm 90,23142 = sm 9 (30). Now, suppose the angle of incidence H IN, to be given,say 30°. With the point of incidence 7, as a centre andradius unity, taken from any scale of equal parts, de-scribe the circumference of a circle; from a table of natu-ral sines take the sine of 30°, and by…
Mechanics · Acoustics · Optics
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