Clear the difference between interference and diffraction. - Vidyadip

Question

Clear the difference between interference and diffraction.

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Answer

S.No.	Interference	Diffraction
1.	Interference occurs due to the superposition of two or more in phase waves of the same frequency.	Diffractioon occurs due to superposition of secondary wavelets emitted from the same wave front.
2.	In the interference pattern all illuminated fringes have the same intensity.	In the diffraction pattern, the intensity of the central illuminated fringe is maximum and the intensity of other illuminated fringes is in decreasing order.
3.	In the interference pattern of waves of equal amplitude the intensity of the dark fringe is zero.	The dark fringes in the diffraction pattern are not to zero intensity
4.	The fringes in an interference pattern are generally of equal width.	The fringes in a diffraction pattern are always of unequal width.
5.	There is a good contrast between bright and dark particles.	There is poor contrast in bright or fork fringes.

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