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clear
//
//
//
//Variable declaration
h=6.6*10^-34; //planck's constant(J-sec)
m=9.1*10^-31; //mass of electron(kg)
c=3*10^8; //velocity of light(m/sec)
e=1.6*10^-19; //charge of electron(c)
E=1000; //energy of electron(eV)
//Calculations
lamda_p=h*c*10^10/(E*e); //wavelength of photon(angstrom)
lamda_e=h*10^10/sqrt(2*m*E*e); //wavelength of electron(angstrom)
//Result
printf("\n wavelength of photon is %0.1f angstrom",lamda_p)
printf("\n wavelength of electron is %0.2f angstrom",lamda_e)
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