Why is the electric field of a dielectric in a capacitor not just cancelled out outside?

Question

As far as I know, a charged plate capacitor produces an electric field between the plates but outside the plates, the fields from the two plates as opposite just cancel out. If we can imagine a dielectric as an array of plates with different charges why its fields just don't cancel out outside the material like in the case of two metal plates?

winter465 · Answer

If we let $L$ be the side length of the plates and $D$ the distance between them, so that $Lgg D$. We can forget the border effects, and the field outside is still zero. Why are you saying that the field outside is non-zero?

Answered by winter465 on August 8, 2021

Why is the electric field of a dielectric in a capacitor not just cancelled out outside?

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