Further, {HEAD ~ the electromagnetic radiation} can be exposed on {TAIL ~ surface} 501 in the form of a pattern  
exposed on
Further , { HEAD ~ the electromagnetic radiation } can be exposed on { TAIL ~ surface } 501 in the form of a pattern
OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH REL REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH