A __________ surface has the maximum thermal emissivity out of the following.
A)Black & smooth
B)Black & rough
C)White & smooth
D)White & rough

Question

Quizplus · Accepted Answer

Black and rough surfaces have the highest thermal emissivity because roughness increases the surface area and black surfaces absorb and emit thermal radiation more effectively than white or lighter colored surfaces.

A __________ Surface Has the Maximum Thermal Emissivity Out of the Following