Problem: Two square metal plates are placed parallel to each other, separated by a distance d= 1.56 cm. The plates have sides of length L = 0.560 m. One of the plates has charge Q= + 1.74×10-6 C, while the other plate has charge -Q. Calculate the magnitude of the electric field between the plates, not close to the edge, i.e., assume a uniform surface charge distribution Here's what I have so far: The electric field between them obviously isn't 0. I've got sigma = (magnitude of charge)/area. The electric field for one plate is E = sigma/(2 * epsilon). Since the fields from both plates in between them point in the same direction, the total field would be E = sigma/epsilon. Would I use E=sigma/epsilon OR E=sigma/(2*epsilon) here for the correct answer? epsilon is just 8.85 here not 8.85E-12 im 99% but I dont really know why. How in the WORLD do I find the area to find sigma though?