A text-book on chemistry. For the use of schools and colleges (1866)
Draper, Henry, 1837-1882 · New York, Harper & brothers · leaf 118
fere; nor will they interfere,even though there be a difference in the length of thesepaths, provided that the difference be equal to one wholewave, or two, or three, etc. But if two systems of waves of equal length encoun- What is the use of the jar of water? How may silence be pro-duced by the… … ter each other after having come through paths of un-equal length, they will interfere; and that interferencewill be complete when the difference of the paths throughwhich they have come is half a wave, or 1^-, 2 J, 3^, etc. These cases are respectively shown at a b and c d.Fig. 7 9, at the point…
Chemistry · Physics
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