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clear
//
//
//
//Variable declaration
d=0.842*10^-10; //lattice spacing(m)
theta1=8+(35/60); //glancing angle(degree)
n1=1; //order
n2=3; //order
//Calculation
theta1=theta1*%pi/180; //angle(radian)
theta3=asin(n2*sin(theta1)); //glancing angle(radian)
theta3=theta3*180/%pi ; //glancing angle(degree)
//Result
printf("\n glancing angle is %0.3f degree",theta3)
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