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+//Example 4.1, Page Number 131
+//The Function fpround(dependency) is used to round a floating point number x to n decimal places
+clc;
+
+kt=0.025
+E=0.4 //(The difference between Ec & Ed)
+Q=(10**8)
+
+j=E/kt
+p=Q*exp(-j) //p is the required probability
+p=fpround(p,2)
+Q1=1/p
+Q1=fpround(Q1,2)
+mprintf("The Probability of Escape per second of the trapped electron:%.2f/s\n",p)
+mprintf(" The Luminescence Lifetime is:%.2fs",Q1)