The term transparent as employed herein refers to {TAIL ~ an optical medium} which is transparent or light transmitting with respect to incident {HEAD ~ fundamental light frequencies} and created light frequencies 
The term transparent as employed herein refers to { TAIL ~ an optical medium } which is transparent or light transmitting with respect to incident { HEAD ~ fundamental light frequencies } and created light frequencies
OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH