| Front | Malus's Law |
| Back | [latex] $ I(\theta) = I_o \cos^2 \theta $ [/latex] |
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| Front | [latex] $ \epsilon $ [/latex] for an anisotropic medium |
| Back | is a tensor of the second rank, [latex] $ \epsilon_{ij} $ [/latex]. It must be Hermitian. For lossless media, its components are real and it is a symmetric tensor, so is diagonalisable. |
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| Front | Electric displacement D |
| Back | [latex] $ \mathbf{D} = \epsilon_0 \mathbf{E} + \mathbf{P} $ [/latex] |
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