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+// Example 5.5
+// To calculate the inaccuracy with which resonator should be fabricated
+// Page no.216
+
+clc;
+clear;
+
+// Given data
+R1=0.9;                                        // Reflectivity at point A
+integer=4;
+n=3.5;                                         // Reflection index of silicon
+F=%pi/(1-sqrt(R1));                            // The finesse of the resonator and also called as the ratio of the free spectral range
+lambda0=850;                                   // Wavelength in nanometer
+L=integer*lambda0/(2*n);                       // Resonator length in nanometer
+
+// The inaccuracy with which resonator should be fabricated
+deltaL=L*0.5/F;
+
+// Display result on command window
+printf('\n Resonator length = %0.0f nm',L)
+printf('\n The inaccuracy in length with which resonator should be fabricated = %0.0f nm',deltaL)