emissivity of a perfectly black body is
Answer (1)
25th Sep, 2020
The emissivity of the surface of the material is its effectiveness in emitting energy as thermal radiation. Thermal radiation is infrared radiation that may include both visible radiation and infrared radiation. Quantitatively, emissivity is the ratio of thermal radiation from a surface to the radiation of ideal black surface at same temperature. Emissivity of a perfectly black body is 1.
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