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A rare gas has N atoms per m3. If electronic polarizability of single atom of this gas is ae, then

∈r = Nae
∈0∈r = Nae
∈0(∈r - 1) = Nae
∈0(∈r - 2) = Nae

Correct Answer: ∈0(∈r - 1) = Nae

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