irradiance etymology

Etymology:

• Irradiance is a derivative of the Latin word "irradiare", which means "to shine upon" or "to emit rays".
• It is formed from the prefix "ir-" (meaning "upon" or "toward") and the root "radius" (meaning "a ray" or "a spoke").

Meaning:

Irradiance is a measure of the power of electromagnetic radiation incident on a surface per unit area. It is expressed in units of watts per square meter (W/m²).

Origin:

The term "irradiance" was first used in scientific literature in the early 19th century to describe the amount of solar radiation reaching the Earth's surface. It was later adopted for use in other fields, such as optics and photometry, to measure the power of radiation from various sources, including lasers, LEDs, and incandescent bulbs.

irradiance relate terms

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