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+clc;clear;
+//Example 8.15
+
+//given data
+V=50000;//applied voltage in V
+p=1.99*10^3;//density in kg/m^3
+n=4;
+Na=6.02*10^26;//Avgraodo no. in 1/kg mole
+M=74.6;//molecular mass
+W=0.248*10^-10;//wavelength in m
+
+//calculation
+Wmin=12400/V;
+disp(Wmin,'short wavelength limit');
+a=(n*M/(Na*p))^(1/3);
+d=a/2;
+D=asind(W/(2*d));
+disp(D,'glancing angle in degree')
+\ No newline at end of file