• # question_answer The intensity of central fringe in a fringe pattern obtained from two slits of equal widths is$I.$ If one of these slits is closed the intensity at the same place becomes ${{I}_{0.}}$ The correct relation between $I$ and ${{I}_{0.}}$ is: A) $I=4{{I}_{0}}$                  B)        $I=2{{I}_{0}}$ C)        $I={{I}_{0}}$                                    D)        $I=\frac{{{I}_{0}}}{2}$

In Youngs double slit experiment is one of the slits is closed, then these will be $\frac{1}{4}th$ effect in the intensity on screen.