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