일반물리학 2 — Gauss' Law: Problem 49

49 Figure 23-47a shows three plastic sheets that are large, parallel, and uniformly charged. Figure 23-47b gives the component of the net electric field along an x axis through the sheets. The scale of the vertical axis is set by \(E_s = 3.0 \times 10^5 \text{ N/C}\). What is the ratio of the charge density on sheet 3 to that on sheet 2?