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+clc;
+close();
+clear();
+//page no 507
+//prob no. 15.12
+//misprinted example number
+c=3*10^8; //speed of light
+f=100*10^6; //frequency
+lembda=c/f; //wavelength
+mprintf('The wavelength of 2GHz is, = %i m\n',lembda);
+Ac=0.13*lembda^2;
+mprintf('The capture area is ,Ac= %.2f m^2',Ac);