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(A) The formula for fringe width $(\beta)$ in Young's double-slit experiment is given by $\beta = \frac{\lambda D}{d}$, where $\lambda$ is the wavelen

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(A) The formula for fringe width $(\beta)$ in Young's double-slit experiment is given by $\beta = \frac{\lambda D}{d}$, where $\lambda$ is the wavelength of light, $D$ is the distance between the slits and the screen, and $d$ is the distance between the two slits.From the formula, it is clear that the fringe width $\beta$ is directly proportional to the wavelength $\lambda$ $(\beta \propto \lambda)$.Therefore, if the wavelength $\lambda$ is decreased, the fringe width $\beta$ will also decrease.

In Young's double-slit experiment, if the wavelength of light is decreased, the fringe width will .....

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