Problem

The variation of the spectral absorptivity of a surface is as given in Fig. P12-78. Determ...

The variation of the spectral absorptivity of a surface is as given in Fig. P12-78. Determine the average absorptivity and reflectivity of the surface for radiation that originates from a source at T = 2500 K. Also, determine the average emissivity of this surface at 3000 K.

FIGURE P12-78

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Solutions For Problems in Chapter 12

1P
2P
3P
4P
5P
6P

7P
8P
9P
10P
11P
12P

139P

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