A parallel plate capacitor is required to be designed using polystyrene as the filler between the plates with a dielectric constant of 2.55. The capacitor is constructed with circular plates of radius 28 mm.

Taking the permittivity of a vacuum (ε0) to be 8.85×10−12F8.85×10−12 m−1 and π to be 3.142 :

Calculate the gap required between the plates to give the component a capacitance of 16pF to one decimal place.