\begin{table}%t2
\caption{Parameters of waves (wave-lengths $\lambda$ in km and frequencies in Hz) propagating through the chromosphere for two different altitudes~$h$ (in~km).}\label{table:2} 
%%\centering
\par
\small
\begin{tabular}{c c c c     }     
\hline\hline
 $h=1065 $  \\
 $\lambda$  & $\omega$ & $ k c_{\rm a}$ & $\omega_{\rm i}/\omega_r$  \\
\hline
   0.1   & $311{-}1222 {\rm i}$ &$44855$     & $ 3.9$  \\
   1 & $327{-}45 {\rm i}$ & $4485$  & $0.14$  \\
      10   & $33.1{-}0.45 {\rm i}$ &$448.5$     & $ 0.014$  \\
        100   & $3.3{-}0.0045 {\rm i}$ &$44.85$     & $ 0.0014$  \\
          500   & $0.66{-}0.0002 {\rm i}$ &$8.97$     & $ 0.0003$  \\
 \hline
 $h=1990 $   \\
 $\lambda$  & $\omega$ & $ k c_{\rm a}$ & $\omega_{\rm i}/\omega_r$  \\
\hline
   0.1   & $69666{-}732 {\rm i}$ &$69829$     & $ 0.01$  \\
   1 & $6891{-}722 {\rm i}$ & $6983$  & $0.1$  \\
      10   & $371{-}94.5 {\rm i}$ &$698.3$     & $ 0.25$  \\
        100   & $36.4{-}0.9 {\rm i}$ &$69.8$     & $ 0.025$  \\
          500   & $7.3{-}0.04 {\rm i}$ &$14$     & $ 0.005$  \\
 \hline
\end{tabular}
\end{table}