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//clc();
clear;
//To calculate miller indices of reflecting planes
lambda=0.82; //wavelength in Angstrom
theta=75.86; //glancing angle in degrees
n=1; //diffraction order
a=3; //lattice constant in Angstrom
d=(n*lambda)/(2*sind(theta));
disp(d);
//but d!=a
//answer in book is wrong
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