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//Example number 5.5, Page number 86
clc;clear;
close;
//Variable declaration
V=344; //accelerated voltage(V)
n=1;
theta=60; //glancing angle(degrees)
//Calculation
theta=theta*%pi/180; //glancing angle(radian)
lamda=12.27/sqrt(V);
d=n*lamda/(2*sin(theta)); //spacing of crystal(angstrom)
//Result
printf("spacing of crystal is %.4f Angstrom",d)
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