emhelp100
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Homework Statement
Two uniform infinite sheets of electric charge, one with charge density +o and the other with -o, intersect at right angles. Find and sketch the electric field \vec{E}
Homework Equations
\vec{E} = \frac{\sigma}{2e_0}
The Attempt at a Solution
Given solution:
[/B]
Numbered counterclockwise starting from \hat{x}
Can someone explain where the directions are coming from?
Why is it (\frac{\hat{x}-\hat{y}}{\sqrt{2}} + \frac{-\hat{x}-\hat{y}}{\sqrt{2}}) for 1. and etc?