9 - InterferenceDiffraction

If the wavefronts are in phase at that point and at

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Unformatted text preview: truc.ve interference •  A point in space is experiencing the effects of two wave fronts simultaneously. •  IF the wavefronts are “in phase” at that point and at that 2me, we say there is construc2ve interference. •  A point in space is experiencing the effects of two wave fronts simultaneously. •  IF the wavefronts are “out of phase” by π at that point and at that 2me, we say there is destruc2ve interference. 1 7/13/11 Construc2ve interference •  For two coherent waves, construc2ve interference occurs when the waves are “in phase.” Or •  Phase difference is a mul2ple of 2π. !" = m(2# ) where m=0, ± 1, ± 2, ± 3,etc. Phase difference due to path ­length difference. Destruc2ve Interference •  IF the wavefronts are “out of phase” by an odd integer mul2ple of π we say there is dest...
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