Intravenous therapy (IV therapy or iv therapy in short) is the infusion of liquid substances directly into a vein. Intravenous simply means within vein.
While the photosphere hovers around 5,800 kelvin, the temperature of the chromosphere varies between 4,500 K and 20,000 K. Even though itâs more distant from the center of the Sun, the chromosphere is hotter than the photosphere.he photosphere is the region of the Sun that we see. It measures an average temperature of almost 5,800 kelvin and produces the visible radiation. This is the point where photons generated inside the Sun can finally leap out into space. The chromosphere measures just 2,000 km, and itâs just outside the photosphere.
The sun's corona is much hotter (by a factor from 150 to 450) than the visible surface of the Sun: the photosphere 's average temperature is 5800 kelvin compared to the corona's one to three million kelvin. The corona is 10 â12 times as dense as the photosphere, and so produces about one-millionth as much visible light.he Coulomb logarithm is roughly 20 in the corona, with a mean temperature of 1 MK and a density of 10 15 particles/m 3, and about 10 in the chromosphere, where the temperature is approximately 10kK and the particle density is of the order of 10 18 particles/m 3, and in practice it can be assumed constant.