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////Given
n1=3
n2=2
E1=-1.5 //ev
E2=-3.4 //ev
h=6.63*10**-34 //Js
c=3*10**8 //m/s
e=1.6*10**-19
//Calculation
v=(h*c)/((E1-E2)*e)
//Result
printf("\n Wavelength is %d Armstrom",v*10**10)
printf("\nthe answers vary due to round off error")
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