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clear
//
//
//
//Variable declaration
h=6.62*10^-34; //planck's constant(J-sec)
m=1.67*10^-27; //mass of proton(kg)
vc=3*10^8; //velocity of light(m/sec)
//Calculations
v=vc/20; //velocity of proton(m/sec)
lamda=h/(m*v); //de-broglie wavelength of proton(m)
//Result
printf("\n de-broglie wavelength of proton is %0.2f *10^-14 m",lamda*10^14)
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