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clear
//
//
//
//Variable declaration
d=0.282 //lattice spacing(nm)
theta=(8+(35/60))*%pi/180 //glancing angle(radian)
n=1 //order
//Calculation
lamda=2*d*sin(theta)/n //wavelength of X-rays(nm)
n=2*d/lamda //maximum order of diffraction
//Result
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