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clear
//
//
//
//Variable declaration
n1=1.563 //Core refractive index
n2=1.498 //Cladding refractive index
//Calculation
NA=sqrt(n1**2-n2**2) //numerical aperture
phimax=asin(NA) //acceptance angle(radian)
phimax=asin(NA)*180/%pi
phimaxd=int(phimax) //acceptance angle(degrees)
phimaxm=60*(phimax-phimaxd) //acceptance angle(minutes)
//Result
printf("\n numerical aperture is %0.4f ",NA)
printf("\n acceptance angle is %0.3f degrees %0.1f minutes",phimaxd,phimaxm)
printf("\n answer for acceptance angle in minutes given in the book varies due to rounding off errors")
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