“…In addition to these two reports [13,17], a few measurements [18, 19] of normal-incidence reflectances have been reported, which deviate slightly from those given by the n and k values determined by ellipsometry [1, 3-11]. Several papers [10,[20][21][22][23][24] have been developed along this line. Bloch and Rice [19] have taken this discrepancy to be real, and proposed a model of the surface-transition zone to reconcile the discrepancy.…”