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//Chapter 5 : Fibre Optics
clear;
//Variable declaration
n1=1.6 //core refractive index
n2=1.58 //clad refractive index
//Calculations
NA=(n1**2-n2**2)**0.5
im=asin(NA)
im=im*180/%pi
//Result
mprintf("Numerical aperture= %f",NA)
mprintf("\nAcceptance angle= %2.2f degrees",im)
//The answer provided in the textbook is incorrect
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