In a Fraunhofer diffraction at a single slit, | vedclass

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(D) The width of the diffraction bands (or the width of the central maximum) in a single-slit Fraunhofer diffraction is given by the formula $\beta =

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(D) The width of the diffraction bands (or the width of the central maximum) in a single-slit Fraunhofer diffraction is given by the formula $\beta = \frac{2\lambda D}{a}$,where $\lambda$ is the wavelength of the light,$D$ is the distance of the screen from the slit,and $a$ is the width of the slit.From the formula,it is clear that the width of the diffraction bands is directly proportional to the wavelength of the light used,i.e.,$\beta \propto \lambda$.Since the wavelength of yellow light is greater than the wavelength of blue light $(\lambda_{	ext{yellow}} > \lambda_{	ext{blue}})$,replacing yellow light with blue light results in a decrease in the wavelength.Consequently,the width of the diffraction bands will decrease,meaning the bands become narrower.

In a Fraunhofer diffraction at a single slit,if yellow light illuminating the slit is replaced by blue light,then the diffraction bands

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