A radiant heating lamp has a surface temperature of 1000 K with ε = 0.8. How large a surface area is needed to provide 250 W of radiation heat transfer?

A radiant heating lamp has a surface temperature of 1000 K with ε =

1.	A radiant heating lamp has a surface temperature of 1000 K with ε = 0.8. How large a surface area is needed to provide 250 W of radiation heat transfer?
A.	0.0035 m2
B.	0.0045 m2
C.	0.0055 m2
D.	0.0065 m2
Answer» D. 0.0065 m2

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A radiant heating lamp has a surface temperature of 1000 K with ε = 0.8. How large a surface area is needed to provide 250 W of radiation heat transfer?

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