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clc//
//
//
//Variable declaration
d=0.313; //lattice spacing(m)
theta=7+(48/60); //angle(degrees)
n=1;
//Calculation
theta=theta*%pi/180; //angle(radian)
lamda=2*d*sin(theta)/n; //wavelength of X-rays(nm)
//when theta=90
n=2*d/lamda; //maximum order of diffraction possible
//Result
printf("\n wavelength of X-rays is %0.5f nm",lamda)
printf("\n answer varies due to rounding off errors")
printf("\n when theta=90, maximum order of diffraction possible is %0.3f ",n)
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