The structure of the chromosphere is studied primarily using filtergrams. Filtergrams are images of the sun taken through a filter that lets in a very narrow wavelength band of light, such as light emitted by the Hydrogen-alpha transition.
Chromosphere
chromosphere
the chromosphere
chromosphere
core-photosphere-chromosphere-corona
chromosphere
Photosphere, Chromosphere, and Corona.
Chromosphere and corona
Considering the solar atmosphere to have three layers (photosphere, chromosphere, and corona), the "middle" would be the chromosphere.
The photosphere comes first, followed by the chromosphere and then the corona. The photosphere is the Sun's visible surface, the chromosphere is the middle layer above the photosphere, and the corona is the outermost layer extending into space.
Chromosphere A + LS.
The sun's atmosphere includes the photosphere, the chromosphere, and the corona.