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clear
//
//
//
//Variable declaration
h=6.60*10^-34; //planck's constant(J-sec)
m=1.67*10^-27; //mass of neutron(kg)
k=8.6*10^-5; //boltzmann constant(eV/deg)
e=1.6*10^-19; //charge of electron(c)
T=300; //temperature(K)
//Calculations
lamda=h*10^10/sqrt(2*m*k*e*T); //wavelength of thermal neutron(angstrom)
//Result
printf("\n wavelength of thermal neutron is %0.3f angstrom",lamda)
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