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//Example 5.12, Page number 5.31
clc;clear;close
// variable declaration
n1=1.5 //unitless
n2=1.49//unitless
a=25 // in m
// Calculations
C_a=asin(n2/n1) // Critical angle
L=2*a*tan(C_a) // in m
N_r=10**6/L // reflections/m
// Result
printf("Critical angle = %.2f degrees",(C_a*180/%pi))
printf("\nFiber length covered in one reflection = %.2f micro-m",(L))
printf("\nTotal no.of reflections per meter = %.f",(N_r))
printf("\nSince L=1m, Total dist. travelled by light over one metre of fiber = %.4f m",(1/sin(C_a)))
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