A silicon wafer (NA=10¹⁴ cm⁻³,τn=1μsec) is first illuminated for a time t≫τn with light which generates GLO=10¹⁶ electron-hole pairs per cm3−sec uniformLly throughout the volume of silicon. At time t=0, the light intensity is reduced, making GL=GLo/2 for t≥0.
