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clc//
//
//
//Variable declaration
V=344; //voltage(V)
n=1;
theta=60*%pi/180; //angle(radian)
//Calculation
lamda=(12.26/sqrt(V)); //de broglie wavelength(angstrom)
d=n*lamda/(2*sin(theta)); //spacing of crystal(angstrom)
//Result
printf("\n spacing of crystal is %0.4f angstrom",d)
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