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SpaceExplorer
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The problem I have is about a simple remark made in the book 'Berkeley Physics Course Volume 2, Electricity and Magnetism', chap. 3 figure 3.4 b. It says that if we have an infinite sheet of charge but with 'other charges' present elsewhere in the system, the only thing we can predict is that at the surface, there will be a change of 4(pi)s, where 's' is the surface charge density, in Ex and 0 in Ey. Why is that? (the book only deals in m.k.s units)