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//Example 9.3, Page Number 474
//The Function fpround(dependency) is used to round a floating point number x to n decimal places
clc;
n1=2.286 //The Ordinary Refractive Index
d=6*(10**-3) //Refractive Index Change
n2=n1-d //Difference of the Two
NA=sqrt((n1**2)-(n2**2))
first=1/(4*NA)
first=fpround(first,2)
second=3/(4*NA)
second=fpround(second,2)
mprintf("The Requirement for Single Mode Behaviour becomes:\n");
mprintf("\t%0.2f <= d/lambda <= %0.2f",first,second);//d=5*Lambda for suitable thickness design
//The answer provided in the textbook for the higher region is wrong
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