irradiance

American  

[ih-rey-dee-uhns] / ɪˈreɪ di əns /

noun

Physics.

1. incident flux of radiant energy per unit area.

---

irradiance British  

/ ɪˈreɪdɪəns /

noun

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

---

Etymology

Origin of irradiance

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

Compare meaning

How does irradiance compare to similar and commonly confused words? Explore the most common comparisons:

• irradiance vs. radiance

Example Sentences

Despite considerable progress, the quest for efficient photon upconversion has faced challenges due to inherent limitations in the irradiance of lanthanide-doped nanoparticles and the critical coupling conditions of optical resonances.

From Science Daily • Feb. 22, 2024

But for solar power generation, the amount of sunshine - also referred to as irradiance - is more important than the amount of heat,

From BBC • Jul. 19, 2022

Cities at higher elevations get more solar irradiance than cities lower in altitude and that increases the reactions that turn nitrous oxide and volatile organic compounds into ozone.

From Salon • Nov. 12, 2021

We know that, from 1900 until the 1950s, solar irradiance increased.

From New York Times • Apr. 19, 2021

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

From Merchantmen-at-arms : the British merchants' service in the war by Bone, David W. (David William)