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//Variable declaration
n=1; //order of diffraction
theta1=8+(35/60); //angle(degrees)
d=0.282; //spacing(nm)
theta2=90;
//Calculation
theta1=theta1*%pi/180; //angle(radian)
lamda=2*d*sin(theta1)/n; //wavelength(nm)
theta2=theta2*%pi/180; //angle(radian)
nmax=2*d/lamda; //maximum order of diffraction
//Result
printf('wavelength is %0.3f nm \n',(lamda))
printf('maximum order of diffraction is %0.3f \n',(nmax))
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