Table 3. Theoretical reflection E-field magnitudes with a 1.0 Vm^-1 incident excitation. The estimation of the variability of reflected radiation using the Fresnel equations at “dry” 15% (n=1.76) and “wet” 40% (n=1.98) SC hydration, at θ of 12.5°, 25° and 50°, as a proportion of the total incident radiation. The best theoretical contrast (largest difference) is with 50°, P-polarised radiation, but at low total intensities.

	S-polarised (y axis)		S-polarised Contrast (K)	P-polarised (x axis)		P-polarised Contrast (K)
	EDry	EWet	1- EDry/EWet	EDry	EDry	1- EDry/EWet
Angle of incidence	n = 1.76	n = 1.98		n = 1.76	n = 1.98
12.5°	0.080	0.113	0.292	0.072	0.103	0.304
25.0°	0.094	0.131	0.282	0.059	0.087	0.320
50.0°	0.179	0.230	0.222	0.013	0.026	0.494