\textbf{195.} In Young's experiment, if the distance between the two slits is $\dfrac{1}{2}$ and the distance of the screen from the two slits is $\dfrac{0.8}{1}$, but the wavelength of light does not change, the width of each fringe becomes how many times?
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(1) $\dfrac{1}{2}$ \hfill (2) $\dfrac{2}{5}$ \hfill (3) $\dfrac{3}{4}$ \hfill (4) $\dfrac{4}{3}$
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