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clear
//
//
//
//Variable declaration
h=6.626*10**-34 //plancks constant(J s)
c=3*10**8 //velocity of light(m/s)
Eg=1.44*1.6*10**-19 //band gap(J)
//Calculation
lamda=h*c/Eg //wavelength of emission(m)
//Result
printf("\n wavelength of emission is %0.0f angstrom",lamda*10**10)
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