What does irradiance mean?
Irradiance refers to the state of emitting or receiving light, often in the form of electromagnetic radiation. It can be measured in terms of the amount of light received per unit area, and is an important concept in fields such as physics, engineering, and astronomy. In everyday language, irradiance is often used to describe the brightness or intensity of light from a source, such as the sun or a light bulb. The term can also be used to describe the spread of light or radiation through a medium, such as air or water. Irradiance is a fundamental property of light and is essential for understanding many natural phenomena, including the behavior of stars, planets, and galaxies. In addition, irradiance is used in various applications, including lighting design, solar energy, and medical imaging. Overall, irradiance is a critical concept that plays a vital role in our understanding of the physical world and its many complexities.
noun
The state of being radiant or emitting light; the amount of light received from a source per unit area.
- 1. The state of being radiant or emitting light; the amount of light received from a source per unit area.
"The irradiance of the sun's rays on the beach was intense, causing sunburn in many tourists."
"The irradiance of the sun's rays on the beach was intense, causing sunburn in many tourists."
"The scientist measured the irradiance of the light emitted by the star."
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of irradiance
The word 'irradiance' comes from the Latin 'irradiare', meaning 'to shine forth', and is derived from 'radius', meaning 'ray' or 'beam'. The term has been used in English since the 17th century to describe the state of emitting or receiving light.
Usage notes
Irradiance is often used in technical and scientific contexts to describe the amount of light received from a source per unit area. In everyday language, the term is often used to describe the brightness or intensity of light from a source.