Black-body radiation

Rarity: Uncommon

A topic a little better known than average, read and translated beyond its own country.

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What Wikipedia says

Black-body radiation is the thermal electromagnetic radiation emitted from a body in thermodynamic equilibrium with its environment. A black body is an idealized opaque and non-reflective body.

Excerpt from the Wikipedia article “Black-body radiation”, under the CC BY-SA 4.0 license. Read the article on Wikipedia

Image: Darth Kule, Public domain, via Wikimedia Commons.