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1. |
An infinite parallel planes with emissivities e‚ÇÅ and e‚ÇÇ, the interchange factor for radiation from surface 1 to surface 2 is given by# |
A. | (e‚ÇÅ + e‚ÇÇ)/ e‚ÇÅ + e‚ÇÇ - e‚ÇÅe‚ÇÇ |
B. | 1/e‚ÇÅ + 1/e‚ÇÇ |
C. | e‚ÇÅ + e‚ÇÇ |
D. | e‚ÇÅe‚ÇÇ |
Answer» B. 1/e‚Äö√á√Ö + 1/e‚Äö√á√á | |