I was wondering what would happened if we titled the screen in Young's double slit experiment (YDSE) by a certain angle say $\theta$. What effect would it have on fringe patterns and their intensities on an axis parallel to the plane of the sheet?
I would speculate that there shouldn't be any signification change if $\theta$ is small as $D$(distance between slit and screen) $>>$ $d$(distance between the slots). So the path difference of light from the two slots stays the same as before, i.e. $∆x=d\sin(\alpha)$, where $\alpha$ is the angle subtended by any point on screen at the center of the two slits. So remaining quantities can be derived similarly.
I also know that if $\theta =90°$, there would be no interference pattern and if the screen is overhead the two slits we would get circular fringes.
What would happen in this case?