Two long parallel surfaces, each of emissivity 0.7 are at different te – McqOptions

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1.	Two long parallel surfaces, each of emissivity 0.7 are at different temperatures and accordingly have radiation exchange between them. It is desired to reduce 75% of this radiant heat transfer by inserting thin parallel shields of equal emissivity 0.7 on both sides. What should be the number of shields?
A.	2
B.	4
C.	1
D.	3
Answer» E.

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