Menu
Home / Mechanical Engineering / Heat and Mass Transfer :: Discussion

Discussion :: Heat and Mass Transfer

  1. Total emissivity of polished silver compared to black body is

    2. A.

     Same
    B.

     Higher
    C.

     More or less same
    D.

     Very much lower

    View Answer

    Workspace

    View Answer

    Answer : Option D

    Explanation :

    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 0.97

Write your comments here:

Be The First To Comment