Question
Download Solution PDFThe emissive power of a body depends upon its
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFExplanation:
The emissive power of a Black Body depends upon its temperature only, whereas in the case of a Grey Body it depends on emissivity as well as temperature.
Emissivity itself depends on
- Type of Material
- Physical nature of the surface
- Viewing angle
- Wavelength
- Geometry
- Temperature
Hence, we can say that the emissive power of a body depends upon all the above factors.
Important Points
The term "body" generally refers to "Grey Body", we cannot assume it "Black Body" unless or until it is specified.
\(E = \in \sigma {T^4}\)
\({E_b} = \sigma {T^4}\)
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