irradiance

[ ih-rey-dee-uhns ]

noun

, Physics.

1. incident flux of radiant energy per unit area.

irradiance

/ ɪˈreɪdɪəns /

noun

1. the radiant flux incident on unit area of a surface. It is measured in watts per square metre Ee Also calledirradiation Compare illuminance

Word History and Origins

Origin of irradiance¹

First recorded in 1660–70; ir- ¹ + radiance

Example Sentences

The irradiance, almost as strong as daylight, but radically different, softened all surrounding objects.

From Project Gutenberg

Their irradiance was greenish, like the walls; but I was certain that these corpuscles did not come from them.

From Project Gutenberg

Overhead, the sky is alight with the warm irradiance of the great city.

From Project Gutenberg