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//Example number 5.3, Page number 85
clc;clear;
close;
//Variable declaration
me=9.1*10**-31; //mass(kg)
h=6.62*10**-34; //plank constant
mn=1.676*10**-27; //mass(kg)
c=3*10**8; //velocity of light(m/s)
//Calculation
lamda=h*10**10/sqrt(4*mn*me*c**2); //de broglie wavelength(angstrom)
//Result
printf("de broglie wavelength is %.1e Angstrom",lamda)
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