documentclass[a4paper,11pt]{article}
usepackage{tikz, tkz-euclide}
usepackage{tikz-3dplot}
usepackage[margin=2.5cm, vmargin={2.5cm,1.5cm}]{geometry}

begin{document}

tdplotsetmaincoords{60}{40}
begin{tikzpicture}[tdplot_main_coords,scale=4]
draw[thick,dashed] (0,0,0) -- (-0.2,0,0) ;
draw[thick,dashed] (0,0,0) -- (0,0.2,0) ;
draw[thick,dashed] (0,0,0) -- (0,0,-0.2) ;
draw[thick,->] (0,0,0) -- (1,0,0) node[anchor=north east]{$x$};
draw[thick,->] (0,0,0) -- (0,-1,0) node[anchor=north west]{$y$}; % pas op y-as geinviteerd
draw[thick,->] (0,0,0) -- (0,0,1) node[anchor=south]{$z$};

draw[very thick, blue] (0,0,0) -- (1,0,{2/3}) node[anchor=west]{$l$} ; % functie in x-z vlak

tdplotsetrotatedcoords{0}{0}{0} %

begin{scope}[tdplot_rotated_coords]
    foreach p in {0,0.02,...,1}
            {tdplotdrawarc[black, very thin]{(0,0,p)}{p*2/3}{0}{360}{}{}{}}
end{scope}

end{tikzpicture}