Question

what is the difference between rough and smooth material

Answer 1

the materials which have irregularities in them are called rough material, these are not polished surface
whereas
the materials which have no irregularities in them are called smooth materials, these are polished surface

Answer 2

the material having irregularity in their surface is called rough material.


the material having smoothness in their surface is called smooth material.


fiction is large in rough surfaces.


fiction is low in rough surfaces.