Please help me with this doubt from electrostatics

[vijayramakrishnan]

in deriving the capacitance of a parallel plate capacitor why do we take the field between the capacitors as σ/∈ and not 2σ/∈,when there are two plates and in the region between the capacitors, field must add up so shouldn't it be 2σ/∈?

 

[willem2]

But the field from a single charged sheet is σ/2∈.
http://hyperphysics.phy-astr.gsu.edu/hbase/electric/elesht.html#c1

 

[vijayramakrishnan]

But the field from a single charged sheet is σ/2∈.
http://hyperphysics.phy-astr.gsu.edu/hbase/electric/elesht.html#c1

oh iam sorry,what i did was idiotic,thank you very much