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//Example 5.5, Page number 5.29
clc;clear;close
// variable declaration
a=50 //unitless
n1=1.53 //unitless
n2=1.50 //unitless
lamda=1 // wavelength
// Calculations
N_a=(n1**2-n2**2) // Numerical aperture
V=((2*%pi*a)/lamda)*N_a**(1/2) // V number
// Result
printf("V number = %.2f",V)
printf("\nmaximum no.of modes propagating through fiber = %.f",V)
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