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diff --git a/2741/CH2/EX2.1/Chapter2_Example1.sce b/2741/CH2/EX2.1/Chapter2_Example1.sce
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+clc
+clear
+//Input data
+l=1;//The thickness of the crystal in cm
+w=5890d-8;//The wavelength of light used in cm
+t2=50;//The final temperature of the crystal in degree centigrade 
+t1=20;//The initial temperature of the crystal in degree centigrade
+p=14;//The number of fringes that crossed the field of view
+
+//Calculations 
+t=t2-t1;//The temperature difference in degree centigrade
+a=(p*w)/(2*l*t);//The coefficient of linear expansion of the crystal in per degree centigrade
+
+//output
+printf('The coefficient of linear expansion of the crystal is %3.4g /degree centigrade',a)
+