Alexander's dark band

{
  "id": "MLC-T-MET-003428",
  "term": "Alexander's dark band",
  "field": "Meteorology and atmospheric science",
  "definition": "A region of reduced brightness located between the primary and secondary rainbows. This optical phenomenon occurs due to the different angles at which light is refracted and reflected within raindrops. It appears noticeably darker than the sky both inside the primary bow and outside the secondary bow.",
  "url": "https://mlchart.com/terminology/meteorology/alexander-s-dark-band/"
}