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clear;
clc;
printf("\nEx1.13\n");
//page no.-24
//given
d=1.5;.............//interatomic spacing in Angstrom
lambda=1.4;.......//wavelength
theta=90;.......//angle in degree
//by BRAGG'S RELATION 2dsin(theta)=n*lambda
n=(2*d)/lambda.........//order of diffraction
printf("\nmaximum order of spectrum is 2\n");
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