I am struggling to grasp the concept of the electric field between two opposite charges. I know that the field is strongest closest to the charge and gets weaker further away from the charge. I also know that the electric field lines go from positive to negative and that they are perpendicular to the equipotential lines. My question is: Is the electric field on the center line (shortest distance) between two opposite charges constant? If not, how can it be constant everywhere in a parallel plate capacitor?