The discussion clarifies the derivation of capacitance for a parallel plate capacitor, specifically addressing the electric field between the plates. The electric field is correctly represented as σ/ε, where σ is the surface charge density and ε is the permittivity of free space. The confusion arose from the misconception that the fields from both plates should add up to 2σ/ε, rather than recognizing that each plate contributes a field of σ/2ε in the region between them. This understanding is crucial for accurately calculating capacitance.
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oh iam sorry,what i did was idiotic,thank you very muchwillem2 said:But the field from a single charged sheet is σ/2∈.
http://hyperphysics.phy-astr.gsu.edu/hbase/electric/elesht.html#c1