Lyman alpha emission line

{
  "id": "MLC-T-MET-007071",
  "term": "Lyman alpha emission line",
  "field": "Meteorology and atmospheric science",
  "definition": "A specific spectral line in the ultraviolet region of the electromagnetic spectrum, produced by hydrogen atoms transitioning from the first excited state to the ground state. This emission is a prominent feature in solar radiation and is used to study the upper atmosphere. It has a wavelength of 121.567 nanometers.",
  "url": "https://mlchart.com/terminology/meteorology/lyman-alpha-emission-line/"
}