Excerpt from: Beicher and Serway, "Physics for Scientists and Engineers with Modern Physics, 5th edition" Chapter 24, problem 58, part c: Two infinite, non conducting sheets of charge are parallel to each other, as show in the figure. The sheet on the left has a uniform surface charge density A, and the one on the right has a uniform charge density -A. Calculate the value of the electric field at points... (c) to the right of the two sheets. The solution is supposed to be zero, but I'm not sure why. It seems that there should be some electric field to the right of the plates due only to the negatively charged plate. Taking the Gaussian approach and enclosing them in a sphere seems to suggest that there is no net electric charge outside the two plates, because the charges are equal and opposite, but I'm not sure. Would someone care to give me another point of view?