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clear
//
//
//
//Variable declaration
n=1.55 //Core refractive index
L=10 //length(m)
delta=0.026 //relative refractive index difference
C=3*10**5
//Calculation
deltaT=L*n*delta/C //total dispersion(s)
blp=L/(2*deltaT) //bandwidth length product(Hz km)
//Result
printf("\n total dispersion is %0.1f ns",deltaT*10**9)
printf("\n bandwidth length product is %0.2f *10**5 Hz km",blp/10**5)
printf("\n answer for bandwidth length product given in the book is wrong")
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