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//Example 5_28
clc();
clear;
//To calculate the effective temprature
theta=28.5 //units in degrees
d=0.203 //units in nm
lamda=(2*d*sin(theta*%pi/180))*10^-9 //units in nano meters
h=6.626*10^-34
m=1.67*10^-27
k=1.38*10^-23
t=h^2/(3*m*k*lamda^2)
printf("The effective tempratures is T=%d K",t)
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