\begin{table}%t2
\caption{Physical parameters for three different coronal loops (the short dense loop, the intermediate loop, and the long rarefied loop). }
\label{table:2}
%\centering
\small
\begin{tabular}{lccccccc}
\hline \hline
Loop  type  & $L$  &  $B$ & $T$ & $n_{\rm e}$& $\tau $& $Q_{\rm rad}$&$\rm{Im}(\omega)$ \\
&(cm)& (G)&(K)&$(\rm{cm}^{-3})$ &(s)&(erg $\rm{cm}^{-3}\rm{s}^{-1})$&$(\rm{s}^{-1})$\\
\hline
%& & & & & & & & \\[-8pt]
Short dense loop &$2\times 10^9$&300&$3.5\times 10^6$& $1\times 10^9$& 45&$1.2\times 10^{-2}$&$2.18 \times 10^{-2}$\\
Intermediate loop &$6\times 10^9$&150&$3\times 10^6$& $3\times 10^9$&130 &$1.1\times 10^{-3}$&$7.09 \times 10^{-3}$\\
Long rarefied loop &$2\times 10^{10}$&50&$2.5\times 10^6$& $1\times 10^{10}$&330 &$1.4\times 10^{-4}$&$2.58\times 10^{-3}$\\
\hline
\end{tabular}
\end{table}