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How To understand how electric field intensity due to an infinite plane of charges is constant at all points.

Electic intensity due to an infinitely charged plane is charge density/2.permittivity and it is independent of distance .Explain.

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Let ABCD be an infinitely positively charged plane. This can be imagined to be a combination of large number of line charges like L shown in the figure.
The electric field due to this plane is along the normal ...