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+// Example 6.38
+// Calculation of a) quantum efficiency b) responsivity
+// Page no 494
+
+clc;
+clear;
+close;
+
+//Given data
+e5=1.2*10^11;                            // No of electrons collected
+e8=3.6*10^11;                            // No of incident photon
+e=1.602*10^-19;                         // Charge of an electron
+lambda=0.85*10^-6;                      // Wavelength 
+h=6.626*10^-34;                        // Planck constant 
+c=3*10^8;                              // Velocity of light
+I=15*10^-6;                            // Photocurrent
+P=0.6*10^-6; 
+
+// a)Quantum efficiency
+n=e5/e8;
+// b)Responsivity
+R=(n*e*lambda)/(h*c);
+
+
+//Displaying results in the command window            
+printf("\n Quantum efficiency = %0.2f  ",n);
+printf("\n Responsivity(in A/W) = %0.3f  ",R);
+
+// The answers vary due to round off error