Calculation of the electric filed intensity of light incident obliquely on a single layer of SnO2 thin-film coating of weakly absorbing material is presented. The analysis utilizes matrix formulas based on Abele's formulas from the calculation of reflectance and transmittance. Partial absorption due to a certain depth in the prepared film by using chemical spray pyrolysis technique was also investigated. The present study offers a useful tool in the understanding of the mechanism of light absorption in many applications, and it is convenient to use intensity of the visible and near infrared spectrum are of interest.
