1. My brother shines a light (A= 600 nm) onto a double slit apparatus and produces the diffraction pattern in frame a). a) b) n.o b) Now he places a thin sheet of glass (n=1.5) in front of one of the openings and the diffraction pattern in frame b) is produced. Determine the thickness of the glass. n = 1.5 =600nm ^=t(n-1) n-1 600010-9 15-1 - 1-2 10 m b) Given that there are no more observable bright fringes determine the separation of the two light sources.