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diff --git a/2414/CH17/EX17.5/Ex17_5.sce b/2414/CH17/EX17.5/Ex17_5.sce
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+clc;
+close();
+clear();
+//page no 554
+//prob no. 17.5
+theta_3dB=.3;    // minimum practical beamwidth in degree
+eta_1=.6;     //illumination efficiency 
+G=eta_1*48000/(theta_3dB)^2;    //gain calculation
+mprintf('The Gain is G= %.0f \n',G)
+G_dB=10*log10(G);   //dB gain
+mprintf('The Gain in dB is G(dB)= %.1f dB \n',G_dB)