Total emissivity of polished silver compared to black body is
A. Same
B. Higher
C. More or less same
D. Very much lower
Answer: Option D
Solution (By Examveda Team)
A polished silver surface has an emissivity of about 0.02 near room temperature. Black soot absorbs thermal radiation very well; it has an emissivity as large as 0.97This Question Belongs to Mechanical Engineering >> Heat And Mass Transfer
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