Johnson's natural philosophy and key to philosophical charts : illustrated with 500 cuts; being reduced photographic copies of all the diagrams contained in the author's philosophical series of indestructible school charts ; for the use of schools and families (1878)
sponds with the convexity of the other, they mutually destroy eachothers effect. So it is with waves of ifo?<^?f?. If waves thus encounterthey destroy each others effect. Hence, two sounds, at the point oftheir encounter, produce silence. In like manner, if two waves of ligtifsimilarly encounter… … Let A and B represent two encountering rays of light, in which thetwo systems of waves or undulations are in opposite phases, the con-vexity of the one corresponding with the concavity of the other,and interference will take place, as at L, uroducing darkness at thispoint. 504- Figure…
Physics · Astronomy
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