Which of the following is a true statement if | vedclass

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

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fringe width decreases and fringes disappear

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(B) The fringe width $\beta$ in Young's double-slit experiment is given by the formula $\beta = \frac{\lambda D}{d}$,where $\lambda$ is the wavelength of light,$D$ is the distance between the slits and the screen,and $d$ is the separation between the slits.As the separation between the slits $d$ is increased,the fringe width $\beta$ decreases.As $d$ continues to increase,the fringe width becomes so small that the fringes eventually become indistinguishable and disappear.

Which of the following is a true statement if,in Young's double-slit experiment,the separation between the slits is gradually increased?

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