$2$

Formula $1$ point

A material has a dielectric constant of $8\mathrm{.}3.$ Consider a charged capacitor with the material in between the plates. Let $E_{\text{p}\text{l}\text{a}\text{t}\text{e}\text{s}}$ represent the magnitude of electric field at the center of the capacitor due to the charges on the metal plates, and $E_{\text{m}\text{a}\text{t}\text{e}\text{r}\text{i}\text{a}\text{l}}$ represent that due to charges of the material. What is the ratio $\frac{E_{\text{m}\text{a}\text{t}\text{e}\text{r}\text{i}\text{a}\text{l}}}{E_{\text{p}\text{l}\text{a}\text{t}\text{e}\text{s}}}?$

Give your answer as a unitless number.

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