The diffraction fringes obtained by a single slit are of (a) equal width (b) equal width and unequal intensity (c) unequal width but equal intensity (d) unequal width and unequal intensity

Answer: (d). Central maximum has width (2Dλ)/(a), secondary maxima have width (Dλ)/(a): unequal widths. Intensity is maximum at the centre and drops for successive secondary maxima: unequal intensity. So the answer is (d).

The diffraction fringes obtained by a single slit are of | MHT CET 2023 (14 May, Shift 1)

Q48MHT CET 2023 · 14 MAY · SHIFT 1Easy

Diffraction at a Single Slit

The diffraction fringes obtained by a single slit are of

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Answer: (d)

Central maximum has width $\dfrac{2D\lambda}{a}$ , secondary maxima have width $\dfrac{D\lambda}{a}$ : unequal widths.
Intensity is maximum at the centre and drops for successive secondary maxima: unequal intensity.
So the answer is (d).

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