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clear
//
//
//
//Variable declaration
NA=0.3 //numerical aperture
gama=45*%pi/180 //angle(radian)
//Calculation
thetaa1=asin(NA) //acceptance angle for meridional rays(radian)
thetaa1=thetaa1*180/%pi //acceptance angle for meridional rays(degrees)
thetaa2=asin(NA/cos(gama))*180/%pi //acceptance angle for skew rays(degrees)
//Result
printf("\n acceptance angle for meridional rays is %0.2f degrees",thetaa1)
printf("\n acceptance angle for skew rays is %0.3f degrees",thetaa2)
printf("\n answer for acceptance angle for skew rays given in the textbook varies due to rounding off errors")
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