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//variable declaration
n1=1.50 //Core refractive index
n2=1.47 //Cladding refractive index
//Calculations
C_a=asin(n2/n1) //Critical angle
N_a=(n1**2-n2**2)**(1/2)
A_a=asin(N_a)
//Results
printf('The Critical angle =%0.3f degrees\n',(C_a*180/%pi))
printf('The numerical aperture =%0.3f \n',(N_a))
printf('The acceptance angle =%0.3f degrees\n',(A_a*180/%pi))
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