In a radiative heat transfer, a gray surface is one – McqOptions

MCQOPTIONS

1.	In a radiative heat transfer, a gray surface is one
A.	Which appears gray to the eye
B.	Whose emissivity is independent of wavelength
C.	Which has reflectivity equal to zero
D.	Which appears equally bright from all directions
Answer» C. Which has reflectivity equal to zero

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