The second development unit forms a second developer image with {HEAD ~ a second developer} permeating {TAIL ~ the light} having prescribed wavelength therethrough 
permeating
The second development unit forms a second developer image with { HEAD ~ a second developer } permeating { TAIL ~ the light } having prescribed wavelength therethrough
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH