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+// To find elapsed time
+// Modern Electronic Instrumentation And Measurement Techniques
+// By Albert D. Helfrick, William D. Cooper
+// First Edition Second Impression, 2009
+// Dorling Kindersly Pvt. Ltd. India
+// Example 14-4 in Page 401
+
+
+clear; clc; close;
+
+// Given data
+n = 1.55; //index of refraction 
+c = 3*10^8; //speed of light in m/s
+d = 1.4*10^3; //Distance in m
+
+//Calculations
+v = c/n;
+t = d/v;
+printf("t = %0.1e s",t);
+disp('Since twice the time to reach the break is required for the reflection to arrive at the reflectometer,' )
+printf("Hence the total elapsed time = %0.3e s",2*t);
+
+//Result
+// t = 7.2e-006 s 
+// Since twice the time to reach the break is required for the reflection to arrive at the reflectometer,   
+// Hence the total elapsed time = 1.447e-005 s 
diff --git a/174/CH14/EX14.4/example14_4.txt b/174/CH14/EX14.4/example14_4.txt
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+t = 7.2e-006 s 
+ Since twice the time to reach the break is required for the reflection to arrive at the reflectometer,   
+Hence the total elapsed time = 1.447e-005 s