A grey body is defined as one whose absorptivity of a surface does not vary with temperature and wavelength of the incident radiation. In other words, if the ratio of emission of a body to that of a black body at a given temperature is constant for all wavelengths, then the body is called a grey body.
48) A grey body is one whose absorptivity
Answer is:
is equal to its emissivity
Explanation:
Related Heat transfer MCQ with Answers
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Grashoff number
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higher
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