Text-book of general physics, for the use of colleges and scientific schools (1899)
Hastings, Charles Sheldon · Boston: Ginn & company · leaf 704
be shown by the aid of Fig.452. Let o be the center ofa drop of water, and AB aplane wave surface movingfrom left to right and fallingupon it. The portion of thewave which meets the dropat a will have its direction of propagation changed and alsohave its curvature made concave, since the velocity… … Fig. 452. 694 OPTICAL PHEX 031 EX A OE THE ATMOSPHERE. as ac. since, bv the law of reflection, the angles on either sideof the radius drawn to c are equal. The wave, accordingly,meets the surface at l> at the same angle that it left the pointa. and hence, on emergence, will suffer a change of…
Physics
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