Am student of class 12 pcm my question is ...on physics ...1. DOES INTENSITY DEPEND ON WIDTH OF SLAB ??.
I'm guessing you're asking about the intensity of light passing via a glass slab.
Check this link out. You might get some help.
https://physics.stackexchange.com/questions/175898/theoretically-is-it-necessary-that-if-light-passes-through-a-glass-slab-its-in