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+// Example 5.24 
+// Calculation of (a) wavelength (b) resposivity and (c) incident power
+// Page no 487
+
+clc;
+clear;
+close;
+
+//Given data
+e=0.7;                      // Efficiency
+c=3*10^8;                   // Speed   of light
+h=6.62*10^-34               // Planck constant
+E=2.2*10^-19;               // Energy of photons
+e1=1.6*10^-19;              // Electron charge 
+// (a) Wavelength computation
+lambda=h*c/E                // Wavelength of laser source
+f=c/lambda;                      
+
+// (b) Responsivity
+R=e*(lambda*e1)/(h*c);                       
+
+// (c) Incident power
+Ip=2*10^-6;                  // Photocurrent
+P=Ip/R;
+
+//Display result on command window
+printf("\n Wavelength of operation (micrometer)= %0.1f  ",lambda*10^6);
+printf("\n Responsivity R (A/W) = %0.2f  ",R);
+printf("\n output power P (microwWatt)= %0.2f  ",P*10^6);
+