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clear
//
//
//
//Variable declaration
h=6.625*10^-34; //planck's constant(J-sec)
m=0.05; //mass(kg)
v=20; //velocity(m/sec)
mp=1.67*10^-27; //mass of proton(kg)
vp=2200; //velocity of proton(m/sec)
me=9.11*10^-31; //mass of electron(kg)
E=10*1.602*10^-19; //kinetic energy(J)
//Calculations
lamda_ball=h/(m*v); //de-broglie wavelength of ball(m)
lamda_p=h*10^10/(mp*vp); //de-broglie wavelength of proton(angstrom)
lamda_e=h/(2*me*E); //de-broglie wavelength of electron(m)
//Result
printf("\n de-broglie wavelength of ball is %e m",lamda_ball)
printf("\n de-broglie wavelength of proton is %0.2f angstrom",lamda_p)
printf("\n de-broglie wavelength of electron is %0.2f *10^14 m",lamda_e/10^14)
printf("\n answer for de-broglie wavelength of electron in the book is wrong")
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