\textbf{196-} In Young's experiment, the slit separation is $D$ and point P on the screen is the location of the third bright fringe. If the slit separation increases to $\dfrac{D}{5}$, point P becomes the location of which fringe?
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(1) fourth bright \hspace{1cm} (2) fourth dark \hspace{1cm} (3) third dark \hspace{1cm} (4) third bright
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