State the characteristics of a single-slit diffraction pattern. - Vidyadip

Question

State the characteristics of a single-slit diffraction pattern.

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Answer

Characteristics of a single-slit diffraction pattern :
1. The image cast by a single-slit is not the expected purely geometrical image.
2. For a given wavelength, the width of the diffraction pattern is inversely proportional to the slit width.
3. For a given slit width $a$, the width of the diffraction pattern is proportional to the wavelength.
4. The intensities of the non-central, i.e., secondary, maxima are much less than the intensity of the central maximum.
5. The minima and the non-central maxima are of the same width, $D \lambda / a$.
6. The width of the central maximum is $2 D \lambda / a$. It is twice the width of the non-central maxima or minima.

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