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% Übung 5, Aufgabe 1
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
clear;

f=[-10:.1:10]*1e9;

n=1+.2*f*1.5e9 ./(f.^2+1.5e9^2);

figure(1);			clf;
plot(f*1e-9,n,'r-',f*1e-9,1./n,'g.')
set(gca,'TickLength',[.03 .05],'FontSize',12,'LineWidth',1);
title('\fontsize{14}-  Brechungsindex      .  Modenabstand')
xlabel('\fontsize{14}{\itf} (GHz)')
ylabel('\fontsize{14}{\itn}')
