Question:
Write any two points of difference between interference pattern due to double-slit and diffraction pattern due to single-slit.
Write any two points of difference between interference pattern due to double-slit and diffraction pattern due to single-slit.
Updated On: Jul 2, 2026
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Solution and Explanation
Differences between Interference and Diffraction
Difference 1: Origin
Interference:
Produced due to superposition of light waves coming from two or more coherent sources.
Diffraction:
Produced due to interference among secondary wavelets originating from different parts of the same wavefront.
Difference 2: Intensity Distribution
Interference:
All bright fringes have nearly equal intensity when the sources are of equal strength.
Diffraction:
Central maximum is the brightest and successive maxima decrease in intensity.
Difference 3: Fringe Width
Interference:
All fringes are equally spaced.
Diffraction:
Central maximum is twice as wide as the secondary maxima.
Difference 4: Requirement
Interference:
Requires two coherent sources.
Diffraction:
Can be observed with a single slit.
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