To find the ratio \( L_2/L_1 \), we need the values of \( L_1 \) and \( L_2 \). It looks like you've provided two lengths, \( T_1 \) and \( T_2 \):
- \( T_1 = 5 \) cm
- \( T_2 = 10 \) cm
If we assume that \( L_1 \) corresponds to \( T_1 \) and \( L_2 \) corresponds to \( T_2 \), we can then calculate the ratio:
\[ \frac{L_2}{L_1} = \frac{T_2}{T_1} = \frac{10 \text{ cm}}{5 \text{ cm}} = 2 \]
Thus, the ratio \( \frac{L_2}{L_1} = 2 \). If \( L_1 \) and \( L_2 \) refer to something else, please clarify!