Two waves are shown below. When the crest of wave A meets the crest of wave B, __constructive _ interference will occur.
What is constructive interference ?
When the path difference between successive crystal planes is equal to an integral number of whole wavelengths then constructive interference happens .
If we add two waves together ( point by point ) , that means crest to crest or trough to trough or when the waves are in phase we end up getting a new wave that looks same but its amplitude is larger .In this situation where the resultant wave is bigger than either of the two original wave is called a constructive interference .
hence , Two waves are shown below. When the crest of wave A meets the crest of wave B, __constructive _ interference will occur.
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