Emissivity

usgb/ɪˌmɪsɪˈvɪti/
noun

The measure of a surface's ability to emit energy as thermal radiation compared to an ideal black body.

The emissivity of the material was calculated to determine its efficiency in heat transfer.
Visual representation of "emissivity" - The measure of a surface's ability to emit energy as thermal radiation compared to an ideal black body.

Often appears as...

  • calculate emissivity
  • emissivity coefficient

Usage tips

Formal

high emissivity, low emissivity, thermal emissivity

Definition 1 of 1
Visual representation of "emissivity"
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Technical Understanding

Emissivity is a key factor in thermal dynamics.

Illustration for Technical Understanding
In heat transfer analysis, knowing the emissivity of materials enhances accurate predictions.
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Contextual Application

It is often related to materials in construction, electronics, and thermodynamics.

Illustration for Contextual Application
Emissivity values vary between materials; metals generally have lower emissivity compared to non-metals.
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Real-World Relevance

Understanding emissivity is vital in climate studies and energy conservation.

Illustration for Real-World Relevance
In solar panels, higher emissivity can improve heat retention.
Visual representation of the word "Emissivity"

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