Barton, Edwin H. (Edwin Henry), b. 1858 · London, Macmillan and Co., limited · leaf 119
angle VAC = <j>; whereas AC makes the 100 SOUND CHAP. II angle 0 with the vertical, since it is perpendicular to thewave front which is inclined 0 to the horizontal. From Clet fall CIsT perpendicular to the horizontal line AN. Then,for the relation between (f> and 0, we have by… … B B Fig. 33.—Drift of Sound Rays in a Wind. the angle </>, which generally differs from 0 whenever thereis a wind in the region in question. The exceptionobviously occurs when the wave front ceases to be oblique.Thus for horizontal wind and vertical wave fronts, we have0=90° and </> =…
Sound
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