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//Example 5_8
clc();
clear;
//To calculate the Bragg angle and the wavelength of X-rays
//Given plane indices are (1,1,1)
theta=87 //units in degrees
theta=theta/2 //units in degrees
a=0.2 //units in nm
h=1
k=1
l=1
d=a/sqrt(h^2+k^2+l^2) //units in nm
lamda=2*d*sin(theta*(%pi/180)) //units in nm
printf("Bragg angle theta=%.1fdegrees \n wavelength lamda=%.3fnm",theta,lamda)
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