Question

what would be the pathway of refracting Ray and emergent Ray is to glass slab kept attached to each other

Answer 1

if two glass slab are kept together then the first slab will dispers the light into its spectrum while the second slab while again form the same light from spectrum light
so overall there will be no deflection in the path of light and hence the light trace the same path through which it falled on the first slab. therefore, reflected ray and emergent ray will be the same.