While conducting the Young's double slit experiment, a student replaced the two slits with a large opaque plate in the $x-y$ plane containing two small holes that act as two coherent point sources ( $\mathrm{S}_1, \mathrm{~S}_2$ ) emitting light of wavelength 600 nm . The student mistakenly placed the screen parallel to the $x$ - $z$ plane (for $z>0$ ) at a distance $D=3 m$ from the mid-point of $S_1 S_2$, as shown schematically in the figure. The distance between the sources $\mathrm{d}=0.6003 \mathrm{~mm}$. The origin O is at the intersection of the screen and the line joining $S_1 S_2$. Which of the following is (are) true of the intensity pattern of the screen?