absorptance
/əbˈzɔrptəns/
noun
- The ability of a surface to absorb energy, such as light or heat, measured as a ratio.
- The absorptance of the solar panel determines how much sunlight it can convert to energy.
- Engineers measured the absorptance of the new coating to improve building insulation.
- Dark materials usually have high absorptance, while shiny ones reflect more light.