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diff --git a/3718/CH1/EX1.3/Ex1_3.sce b/3718/CH1/EX1.3/Ex1_3.sce
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+//Chapter 1: Structure and Bonding
+//Problem: 3
+clc;
+
+//Declaration of Constant
+c = 3 * 10 ** 8                 // Speed of light,in m/sec
+
+//Declaration of Variable
+T = 2.4 * 10 ** -10             // Time period,in sec
+
+// Solution
+f = 1 / T                   // Frequency,per sec
+lamda = c / f               // Wavelength,in m
+v = 1 / lamda               // Wavenumber,per meter
+
+mprintf("Frequency: %.2e /sec\n',f)
+mprintf(" Wavelength: %.2e m\n",lamda)
+mprintf(" Wave number: %.2e /m",v)