已知曲线\(C_{1}\)的极坐标方程为\(ρ^{2}\cos 2θ=8\),曲线\(C_{2}\)的极坐标方程为\(θ= \dfrac {π}{6}\),曲线\(C_{1}\)、\(C_{2}\)相交于\(A\)、\(B\)两点\(.(p∈R)\)
\((\)Ⅰ\()\)求\(A\)、\(B\)两点的极坐标;
\((\)Ⅱ\()\)曲线\(C_{1}\)与直线\( \begin{cases} x=1+ \dfrac { \sqrt {3}}{2}t \\ y= \dfrac {1}{2}t\end{cases}(t\)为参数\()\)分别相交于\(M\),\(N\)两点,求线段\(MN\)的长度.