Q. The interchange factor for radiation heat transfer from surface 'x' to surface 'y' in case of an infinite parallel planes with emissivities εx & εy is given by

(A) εx + εy
(B) εx . εy
(C) 1/εx + 1/εy
(D) (εx + εy)/( εx + εy - εx . εy)

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✅ Correct Answer: (D) (εx + εy)/( εx + εy - εx . εy)

Published by Mr. Dubey ⭐ 109.99K Points at 20-Sep-2023 12:23 pm in Heat Transfer

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