clear // // // //Variable declaration lamda=0.071*10**-9 //wavelength(m) h=1 k=1 l=0 //miller indices a=0.28*10**-9 //lattice constant(m) n=2 //order //Calculation d=a/sqrt(h**2+k**2+l**2) theta=asin(n*lamda/(2*d))*180/%pi //glancing angle(degrees) //Result printf("\n glancing angle is %0.2f degrees",theta)