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Unformatted text preview: constructive interference, and when the amplitudes partially or wholly cancel each other out it is called destructive interference. Identical waves that overlap completely are said to be in-phase and will constructively interfere at all points, with an amplitude double that of either constituent wave. Otherwise identical waves (that is they have the same frequency and amplitude) that differ in phase by exactly 180 o ( radians) are said to be out-of-phase, and will destructively interfere at all points. Some examples are illustrated in and . The principle of superposition will come to be of vital importance in the rest of our study of optics. Figure %: Constructive interference. Figure %: Destructive interference....
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- Fall '10