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