//chapter 3 example 3// clc clear //core refractive index=n1,cladding refractive index=n2,refractive index of air=na,numerical aperture=NA,acceptance angle=A,multiple time dispersion=M,relative refractive index difference=d,speed of light=C// n1=1.55; n2=1.51; d=n1-n2; n=(n1+n2)/2; NA=sqrt(2*d*n); printf("\n 1) numerical aperture=%f.\n",NA); A=asind(NA); printf("\n 2) acceptance angle=%f.\n",A); C=(3*(10^8));//in mts per sec// M=((n1*d)/(n2*C))*(10^12); printf("\n 3) multiple time dispersion=%f ns/km \n",M);