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clear
//
//
//
//Variable declaration
n1=1.53 //Core refractive index
delta=0.0196 //relative refractive index difference
//Calculation
NA=n1*sqrt(2*delta) //numerical aperture
thetaa=asin(NA)*180/%pi //acceptance angle(degrees)
//Result
printf("\n numerical aperture is %0.3f ",NA)
printf("\n acceptance angle is %0.3f degrees",thetaa)
printf("\n answer for acceptance angle given in the textbook varies due to rounding off errors")
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