6.
已知圆锥曲线\(C:\begin{cases}x=2\cos α \\ y= \sqrt{3}\sin α\end{cases} (α\)为参数\()\)和定点\(A(0, \sqrt{3}),{F}_{1},{F}_{2} \)是此圆锥曲线的左、右焦点,以原点\(O\)为极点,以\(x\)轴的正半轴为极轴建立极坐标系.
\((\)Ⅰ\()\)求直线\(AF_{2}\)的直角坐标方程;
\((\)Ⅱ\()\)经过点\(F_{1}\)且与直线\(AF_{2}\)垂直的直线\(L\)交此圆锥曲线于\(M\)、\(N\)两点,求\(\left| \left| M{{F}_{1}} \right|-\left| N{{F}_{1}} \right| \right|\)的值.