{HEAD ~ The surface portions} are transparent, scatter or reflect {TAIL ~ incident light} or diffract the incident light at microscopic relief structures  
reflect
{ HEAD ~ The surface portions } are transparent , scatter or reflect { TAIL ~ incident light } or diffract the incident light at microscopic relief structures
HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH