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clear
//
//
//
//Variable declaration
D=180 //separation between screen and slit(cm)
d=0.04 //separation between slits(cm)
beta1=0.3 //fringe width(cm)
//Calculation
lamda=(beta1*d*10**4/D) //wavelength(cm)
//Result
printf("\n wavelength is %0.0f angstrom",lamda*10**4)
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