A light emitting device 1, wherein said predetermined distance is in the range of {HEAD ~ 1 μm} to {TAIL ~ 10 mm} 
A light emitting device 1 , wherein said predetermined distance is in the range of { HEAD ~ 1 μm } to { TAIL ~ 10 mm }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL