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clear
//
//
//
//Variable declaration
n1=1.48 //Core refractive index
n2=1.45 //Cladding refractive index
//Calculation
NA=sqrt(n1**2-n2**2) //numerical aperture
theta0=asin(NA) //acceptance angle(radian)
theta0=theta0*180/%pi //acceptance angle(degrees)
theta0m=60*(theta0-int(theta0)) //acceptance angle(minutes)
thetac=asin(n2/n1) //critical angle(radian)
thetac=thetac*180/%pi //critical angle(degrees)
thetacm=60*(thetac-int(thetac)) //critical angle(minutes)
delta=(n1-n2)/n1 //fractional index change
//Result
printf("\n numerical aperture is %0.4f ",NA)
printf("\n acceptance angle is %0.3f degrees %0.0f minutes",theta0,theta0m)
printf("\n critical angle is %0.3f degrees %0.3f minutes",thetac,thetacm)
printf("\n fractional index change is %0.2f ",delta)
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