Question

Differentiate between interference and diffraction of light .

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Answer 1

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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. The region of minimum intensity is perfectly dark in interference. In diffraction they are not perfectly dark

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Answer 2

Explanation:

#Interference :-

(1) It is due to superposition of two waves coming from two cohrent sources.

(2) The width of the interference interference band is equal .

(3) The intensity of all Maxima (fringes) is same.

# Diffraction:-

(1) It is due to the superposition of secondary wavelets originating from different parts of the same wavefront .

(2) The width of the diffraction band is not the same .

(3) The intensity of central Maxima is maximum and goes on decreasing rapidly with increase order of Maxima.

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