Explain the difference between interference and diffraction of light
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Two separate wave fronts originating from two coherent sources produce interference. Secondary wavelets originating from different parts of the same wave front constitute diffraction. Thus the two are entirely different in nature.The region of minimum intensity is perfectly dark in interference. In diffraction they are not perfectly dark.Width of the fringes is equal in interference. In diffraction they are never equal.The intensity of all positions of maxima are of the same intensity in interference. In diffraction they do vary.
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Hey !!
INTERFERENCE
It is due to the superposition of two waves coming from two coherent sources.
The width of the interference bands is equal.
The intensity of all maxima ( fringes ) is same.
DIFFRACTION
It is due to the superposition of secondary wavelets originating from different parts of the same wavefront.
The width of the diffraction bands is not the same.
The intensity of central maximum is minimum and goes on decreasing rapidly with increase in order of maxima.
Good luck !!
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