Carhart, Henry S. (Henry Smith), 1844-1920 · Boston : Allyn and Bacon · leaf 277
t CD = p-Cd, describe a small circle. Inthe same way any otherpoint of the surface ABwill be the centre of a corresponding secondary wave. The refracted wave will bethe envelope of all these secondary spherical waves, and thenew wave-front will be AdB. The incident wave is therefore flattened down… … Fig. 126. REFLECTION AND REFRACTION. 267 N If r and r denote the radii, OD and Od, of the incidentand refracted waves AC2 = 2r • CD = 2r - (70 nearly.But OD = fi • Cd ; therefore r = pr, or the radius of the refracted wave is approximately //.times that of the incident wave. The true wave-surfacein…
Physics
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