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