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diff --git a/623/CH1/EX1.1.26/U1_C1_26.sce b/623/CH1/EX1.1.26/U1_C1_26.sce
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+//variable initialization
+RestEnergy=0.51                                   //rest energy of electron (Mev)
+T=1                                               //potential difference i.e. kinetic energy (Mev)
+c=3*10^8;                                         //speed of light (meter/second)
+
+//calculation of speed of electron
+Beta=(1-(RestEnergy/(T+RestEnergy))^2)^(1/2);     //calculation of Beta
+v=Beta*c;                                         //speed of electron (meter/second)
+
+printf("\n\tThe speed of the electron = %.2e meter/second",v);
+
+//Note: In the book answer of Beta is slightly wrong