The indices for refraction for various media are as follows:

\begin{array}{|l|l|}

\hline \text { Medium } & \text { Index of Refraction }(\mathbf{n}) \\

\hline \text { Air/vacuum } & 1.00 \\

\hline \text { Ice } & 1.31 \\

\hline \text { Water } & 1.33 \\

\hline \text { Ethyl alcohol } & 1.36 \\

\hline \text { Vegetable oil } & 1.47 \\

\hline \text { Acrylic } & 1.49 \\

\hline \text { Glass } & 1.52 \\

\hline \text { Diamond } & 2.42 \\

\hline

\end{array}