//Example no 1-13
//page no. 27
clc;
clear;
//I1/I0=cos(w)^2
//Given I1/I0=0.55

k=sqrt(0.55);  //from above formulae
printf("\n cos w is %0.2f ",k);
printf("\n The angle bw polarizer and analyser , w is %0.0f degree",acos(k)*180/%pi);//Result