8.
用\(min\{a,b\}\)表示实数\(a\),\(b\)中的较小者,已知向量\( \overrightarrow{a}\),\( \overrightarrow{b}\),\( \overrightarrow{c}\)满足\(| \overrightarrow{a}|=1\),\(| \overrightarrow{b}|=2\),\( \overrightarrow{a}⋅ \overrightarrow{b}=0\),\( \overrightarrow{c}=λ \overrightarrow{a}+μ \overrightarrow{b}(λ+μ=1)\),则当\(min\{ \overrightarrow{c}⋅ \overrightarrow{a}, \overrightarrow{c}⋅ \overrightarrow{b}\}\)取得最大值时,\(| \overrightarrow{c}|=(\) \()\)