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clear
//
//
//
//Variable declaration
h=1
k=1
l=1 //miller indices
a=0.2 //lattice parameter(nm)
theta=(87/2)*%pi/180 //angle(radian)
//Calculation
d=a/sqrt(h**2+k**2+l**2)
lamda=2*d*sin(theta) //wavelength of Xrays(nm)
//Result
printf("\n wavelength of Xrays is %0.3f nm",lamda)
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