black body
2
8.5
- noun
- /blæk ˈbɑdi/
- Specialized
:
cuerpo negro
- A black body absorbs all electromagnetic radiation without reflecting any light.
- black body radiation
Things like lava or hot coals glow because of what's called black body radiation.
- Things like lava or hot coals glow because of what's called black body radiation.
- And the black body, black body radiation carries entropy.
Examples
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Things like lava or hot coals glow because of what's called black body radiation.
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Why do bodies at a given temperature radiate even if not a perfect black body?
Blog text (18) -
The sun is almost a perfect black body, meaning because it has no solid surface, it's made of gas or plasma.
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Whether or not this entirely explains the temperature rise of the Earth over the black body temperature, I cannot say.
Blog text (18) -
The air does not radiate as a black body.
Blog text (18) -
Martin provided a brief refresher on black body radiation.
Academic text (2000) -
The earth acts as a black body whose temperature will be calculated from SB.
Blog text (18) -
The black body sphere again radiates exactly as much energy as it receives.
Blog text (18) -
If the earth were an ideal black body, 250 milliwatts would change the temperature by 0.04°C.
Blog text (29) -
Black-body radiation—the distribution of the different frequencies of light by a heated object—is a case in point.
Academic text (1997)
Synonyms
3
9.9
An object that absorbs all light and gives off heat and light depending on its temperature
An object that absorbs all light and other rays and emits the most energy for its temperature
How Absorbent
- Specialized
2
8.5
- Specialized
1
9.9
- Specialized
27
2.4
- Specialized
5
4.6
Surface Forms
Morphology
A B1 learner who knows 'black' and 'body' will plausibly infer an object that is dark or absorbs light, since 'black' commonly implies absorption of visible light. However, the precise, domain-specific sense of an idealized object that absorbs all electromagnetic radiation at all frequencies and angles is technical and not fully predictable from the constituents, so the expression is only partially transparent.
Etymology
Black body comes from the image of a perfectly black body, meaning an object that 'absorbs' all light and does not reflect any. When heated, such an object 'emits' light in a simple pattern, so scientists use the term for an ideal object that takes in and gives out heat and light.