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// Example no.5.4
// To determine the refractive index and thickness of the antireflection coating
// Page no.199
clc;
clear;
// Given data
lambda=680*10^-9; // Wavelength of red ligth in meter
nair=1; // Refractive index of air
nsilicon=3.6; // Refractive index of silicon
nAR=sqrt(nair*nsilicon); // Refractive index of antireflection coating
tAR=lambda/(4*nAR); // Thickness of antireflection coating
// Display result on command window
printf('\n Refractive index of antireflection coating = %0.1f ',nAR)
printf('\n Thickness of antireflection coating = %0.0f nm',tAR*10^9)
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