If one end of focal chord of the parabola ${\mathrm{y}}^2=8\mathrm{x}$ is $\left(\frac{1}{2},2\right)$, then the length of the focal chord is ____ units

The given parabola is ${\mathrm{y}}^2=8\mathrm{x}$

Parametric points on the parabola are $\left(\mathrm{a}{{\mathrm{t}}_1}^2,2{\mathrm{at}}_1\right) \left(\mathrm{a}{{\mathrm{t}}_2}^2,2{\mathrm{at}}_2\right)$

Here $a=2,t_1{t}_2=-1$

Therefore, the points are $\left(\frac{1}{2},2\right),\left(8,-8\right)$

The length of the focal chord is the distance between the above two points 

Hence, length of the focal chord is $\frac{25}{2}$ sqaure units