Q. Distinguish between interference and diffraction fringes?
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Interference
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Diffraction
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1) It is because of the superposition of secondary wavelets from two different wave fronts produced by two coherent sources.
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1) It is because of the superposition of secondary wavelets emitted from various points of the a. same wave front.
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2) Fringes are evenly spaced.
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2) Fringes are unevenly spaced.
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3) Bright fringes are of similar intensity
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3) Intensity falls rapidly
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4) Comparing among diffraction it has large number of fringes
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4) It has less number of fringes.
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