Study of Some Optical Properties of Gypsum and Graphite Powder

Abstract

In this work the required instruments had set up and required material had prepared. In the first, powder of material gypsum and graphite was taken as grams and projecting light form a distance and change the grams with changing of the distance of the projecting light for many times and thus got results by assistant of photocell and multimeter to calculate change of the voltage with of grams of powder material and taken as composite of two materials (gypsum and graphite) then hereafter studies change of velocity to find different changed of light and properties like wavelength , absorption ,transmission and reflection on the bases of available results . Results showed that the rate of absorption is greater than reflection rate and rate of transmission is the least one these gypsum-graphite composite improved the characteristics of each other with comparative the characteristics of gypsum and graphite as different. The coefficients are increased with increased the Mass of material.