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(B) The angular width of the central maximum in a single slit diffraction is given by $	heta = \frac{2\lambda}{d}$,where $\lambda$ is the wavelength

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narrower and brighter

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(B) The angular width of the central maximum in a single slit diffraction is given by $	heta = \frac{2\lambda}{d}$,where $\lambda$ is the wavelength and $d$ is the slit width.Since $	heta \propto \frac{1}{d}$,if the slit width $d$ is doubled,the angular width $	heta$ becomes half,meaning the central maximum becomes narrower.As the width of the central maximum decreases,the energy is concentrated in a smaller area,which increases the intensity of the central maximum,making it brighter.

In a single slit diffraction experiment,the width of the slit is made double its original width. Then the central maximum of the diffraction pattern will become

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