Daniell, Alfred, 1853-1937 · London : Macmillan · leaf 150
us, and if it be surrounded by a complete ellipsoidalreflecting surface, a wave passes back and fore between the foci, alternatelyconverging and diverging, first at one, then at the other focus. * Take a long strip of bright tinplate ; bend it into a semicircle ; place it on itsside on a sheet of… … 122 KINEMATICS. [CHAP. Transmission of a linear wave into a denser medium.— If, as in Fig. 65, the particles be more closely placed in B thanFi 65 in A, B is the denser medium. A ^ B ^ ^ A linear wave-motion travels p to the right in A; it arrives at P. It meets a relative obstruction. P, the first…
Physics
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