Transmittance

{
  "id": "MLC-T-ENV-028585",
  "term": "Transmittance",
  "field": "Environment",
  "definition": "Transmittance is the fraction of radiant energy that, having entered a layer of absorbing material, reaches its further boundary. For example, when sunlight reaches a tree's canopy, some amount of light is absorbed by the leaves and used for photosynthesis, some amount is reflected back into the atmosphere, and some amount is transmitted to the grass or ground below. The latter quantity determines the tree's transmittance, which is typically 10% to 30% in the summertime.",
  "subject": "Air",
  "references": [
    "Heat Island Effect Glossary"
  ],
  "url": "https://mlchart.com/terminology/environment/transmittance/"
}