The corona is separated from the photosphere by the relatively shallow chromosphere. The layer of the chromosphere atop the photosphere is homogeneous. Solar flares affect all layers of the solar atmosphere (photosphere, chromosphere, and corona). The chromosphere sits just above the photosphere and below the solar transition region. Aditya-L1 will be able to provide observations of Sun's photosphere, chromosphere and corona. However, hotter upper layers of the Sun's atmosphere (chromosphere and corona) emit more short-wavelength radiation. The chromosphere, transition region, and corona are much hotter than the surface of the Sun. In the upper part of the chromosphere helium becomes partially ionized. There are about 300,000 active spicules at any one time on the Sun's chromosphere. The same phenomenon in eclipsing binaries can make the chromosphere of giant stars visible. First he applied it to the solar chromosphere, then to stellar spectra. Drag from the chromosphere of the Sun would also reduce the Earth's orbit. Above this layer is a thin region known as the chromosphere. He also observed the emission spectrum of the chromosphere, including the same yellow line. The density of the chromosphere decreases with distance from the center of the Sun.