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//Example 16.1 //de-broglie wavelength
clc;
clear;
//given data :
h=6.62D-34;// plank's constant in joules-sec
m=9.1D-31;// mass of electron in Kg
V=1.25D3;// Potential difference in kV
E=V*1.6D-19;// energy associated to potential in joule
lamda=h/sqrt(2*m*E);// formula to calculate
disp(lamda,"de broglie wavelength in m ")
//in book it is wronglly calculated
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