1.

A sphere of radius 'R‚ÇÅ' is enclosed in a sphere of radius 'R‚ÇÇ'. The view (or shape) factor for radiative heat transfer of the outer sphere with respect to the inner sphere is#

A. 0
B. R‚ÇÇ/(R‚ÇÅ+R‚ÇÇ)
C. 1
D. (R‚ÇÅ/R‚ÇÇ)2
Answer» C. 1


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