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clear
//
//
//
//Variable declaration
a=50
n2=1.5 //refractive index of cladding
n1=1.53 //refractive index of core
lamda0=1 //wavelength(micro m)
//Calculation
V_number=(2*%pi*a*sqrt(n1**2-n2**2)/lamda0) //V number
n=V_number**2/2 //maximum number of modes
//Result
printf("\n maximum number of modes is %0.3f ",n)
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