Gage, Alfred P. (Alfred Payson), 1836-1903 · Boston, London, Ginn · leaf 214
ong as sound-waves are not ob-structed in their motion they are propagated in the form ofconcentric spheres ; but when they meet with an obstacle,they follow the general law of elastic bodies; that is, theyreturn upon themselves, forming new concentric waves, calledreflected waves, which seem to… … Fig. 160. emanates a series of waves. P Q represents an obstacle witha flat surface turned toward the waves. Take, for example,the incident wave MCDN, emitted from the center A; thecorresponding reflected wave is represented by the arc C K D 198 MOLAE DYNAMICS. of a circle whose center a is as far…
Physics
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