Question

I. The reflectivity of silicon at 633 nm is 35% and the absorption coefficient is 3.8x105 m.. Calculate (i) coefficient of transmission and (ii) Optical density of a sample with a thickness of 10 um. 3. Figure below shows T vs. 2 plot for Cdse with n 2.5 for its transparent region. Calculate R and T. Is CdSe transparent for the ordinary light? s(b) 0.6 tx,4 CdSe Semiconductor 0.0 10 Wavelength (microns)

Optics Problem. Please Help!

Answer 1

Given that (i) coefficient of transaction of the medium T = (1 - R)^2 e^- alpha 1 R = reflectivity = 0.35 Alpha = absorption coefficient = 3.8 times 10^m^- 1 t = thickness = 10 mu m Substituting all the know value gives T = 0.422339 or T = 42.23 % (ii) optical density dot optical density = 0.434 alpha 1 substituting value gives dot optical density = 1.64 times 10^- 4