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clear
//
//
//
//Variable declaration
a=25*10**-6
n1=1.48 //refractive index of core
delta=0.01 //refractive index difference
V=25 //Vnumber
//Calculation
lamda=2*%pi*a*n1*sqrt(2*delta)/V //cutoff wavelength(m)
//Result
printf("\n cutoff wavelength is %0.3f micro m",lamda*10**6)
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