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)
f the piece of wire, F. The twoseries of waves which have passed fromthe opposite sides of the obstacle to themiddle point, N, of its shadow, havingpassed through paths of equal length,Avill encounter in such a manner asnot to interfere; and, therefore, theywill exalt each others effect, and… … 284 OPTICS. at Y in such a manner as to interfere and destroy each others effect,and so produce a dark stripe at this point. At the point, L, the waves from each side of the obstacle again havecome through unequal paths which differ in length by a ivhole wave,and, therefore, they will again…
Physics · Astronomy
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