Question 341: Waves Optics

Question

A parallel beam of monochromatic light falls normally on a single narrow slit. The angular width of the central maximum in the resulting diffraction pattern

Accepted Answer

Width of central maximum $$\mathrm{W}_{\mathrm{c}}=2\left[\frac{\lambda \mathrm{D}}{\mathrm{a}}ight]$$
$$\Rightarrow \mathrm{W}_{\mathrm{c}} \propto \frac{1}{\mathrm{a}}$$
$$	herefore \quad$$ Angular width of principal maximum decreases with increase in width of the slit.

Answer

increases with increase of slit width.

Answer

decreases with increase of slit width.

Answer

decreases with decrease of slit width.

Answer

may increase or decrease with decrease of slit width.

Waves Optics

A parallel beam of monochromatic light falls normally on a single narrow slit. The angular width of the central maximum in the resulting diffraction pattern

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