| He noticed that, although coronal light had the same distribution of colours as light from the solar surface the photosphere it lacked the absorption lines observed in photospheric light. |
| Later it was found that there had been errors in prior photospheric determinations. |
| We can, however, extrapolate the photospheric magnetic field into the corona. |
| Line asymmetries are generated by convective motions in stellar atmospheres, especially when the convective zone reaches high photospheric levels, indeed the case for the metal-poor turn-off stars in which 6Li was found. |
| Grotrian hypothesized that coronal light consists of photospheric light that has been scattered toward Earth by free electrons in the corona. |
| Joking aside, a low photospheric oxygen abundance is incompatible with the structure of the solar interior inferred from helioseismology. |
