Refractive indices of materials
How strongly about 65 gases, liquids, glasses, plastics, crystals and semiconductors bend light — refractive index n, from helium (1.000036) to germanium (about 4.1) — with the wavelength it was measured at where given. One row per material.
Columns
Stable keys — use them in the API, SQL and code
| Key | Name | Type | Description |
|---|---|---|---|
| material | Material | string | — |
| group | Group | string | Source sub-heading: gases, liquids, solids or other materials. |
| wavelength_nm | Wavelength | string · nm | Wavelength of light the value applies to, as listed (a range for some infrared materials). |
| refractive_index | Refractive index | number | Refractive index n (midpoint when the source gives a range). |
| refractive_index_min | n (low) | number | Low end of the listed value or range. |
| refractive_index_max | n (high) | number | High end of the listed value or range. |
| as_listed | As listed | string | Refractive index text exactly as given in the source. |
| remark | Remark | string | Extra detail from the source's reference column, e.g. birefringent indices. |
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