noun
- the amount of electromagnetic radiation (such as light) falling on a surface per unit area
Usage: physics; technical
Examples
- The solar irradiance at Earth’s surface varies throughout the day.
- Scientists measured the irradiance of the LED to determine its efficiency.
- Cloud cover significantly reduces the irradiance reaching the ground.
- The instrument recorded peak irradiance values at noon.
- Irradiance is typically measured in watts per square meter.
- The greenhouse’s irradiance levels were monitored for optimal plant growth.