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////Given
T=27 //temperature in degree c
K=1.38*10**-23 //boltzmann constant in J/K
h=6.63*10**-34 //Js
m=1.67*10**-27
//Calculation
//
T1=T+273
v=h/(sqrt(2*m*K*T1))
//Result
printf("\n de broglie wavelength is %0.2f A",v*10**10)
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