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