from picture, If we put camera directly at screen and look back at slit.
move camera around fringe A, B, C .... what we gonna see?
in bright fringe A, we should see light source through one of two slit,
when in dark fringe, we should shadow between slit,
and when in bright fringe B ... will we see another multiply light source?? through which slit?
what about C D E F???
will we see light source appear though slit again and again even we move camera only on direction?? (form A to F)
you know what i try to say right? = ='