In an experiment to demonstrate interference of flight using \( \ma...

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In an experiment to demonstrate interference of flight using
\( \mathrm{P} \) Young's slits, separation of two slits is doubled. In order to

W maintain same spacing of fringes, distance \( D \) of screen from slits must be changed to :
(A) \( D \)
(B) \( \frac{D}{2} \)
(C) \( 2 D \)
(D) \( \frac{3 D}{4} \)
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