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clear
//
//
//
//Variable declaration
x=15 //distance(cm)
d=0.005 //diameter(cm)
lamda=6000*10**-8 //wavelength(cm)
//Calculation
alpha=d/x //angle(radian)
beta1=lamda/(2*alpha) //fringe width(cm)
//Result
printf("\n fringe width is %0.3f cm",beta1)
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