The refractivity of st coefficient is 4 um. (20 points) mis 60% and the absorption ainless teel (304l) plate at 1.06 s4 x 105 m. calculate the transmission of a sample with a thickness of 20 6. calculate for the stainless steel (304l) plate at 10.6 μm with a temperature of 1427 c: (a) the absorption coefficient and (b) the reflectivity. the complex refractive index and extinction coefficient for the steel plate are given at table below.