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diff --git a/3537/CH1/EX1.7/Ex1_7.sce b/3537/CH1/EX1.7/Ex1_7.sce
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+//Example 1_7
+clc; 
+clear;
+//Calculate the fringe width
+d=0.2                  //units in mm
+d=0.2*10^-3            //units in mts
+lamda=550              //units in nm
+lamda=550*10^-9        //units in mts
+D=1                    //units in mts
+betaa=(lamda*D)/d      //units in mts
+betaa=betaa*10^3       //units in mm
+printf("Fringe width on a screen at a distance of 1m from the slits is %.2fmm",betaa)
+\ No newline at end of file