Question: Four diffuse surfaces having the spectral characteristics shown are at 300 K and are exposed to solar radiation, which of the surfaces may be approximated

Four diffuse surfaces having the spectral characteristics shown are at 300 K and are exposed to solar radiation, which of the surfaces may be approximated as being gray?

0.8 0.8 Surtace A Surface B 0.3 6. a um) A (um)

0.8 0.8 Surtace A Surface B 0.3 6. a um) A (um) Surface D 0.7 Surlace C 0.3 0.3 3. 2 (um) 9. A (um) 9,

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