The emissivity of a surface coated with aluminum oxide can be approximated to be 0.15 for radiation at wavelengths less than 5 μm and 0.9 for radiation at wavelengths greater than 5 μm. Determine the average emissivity of this surface at (a) 5800 K and (b)300 K. What can you say about the absorptivity of this surface for radiation coming from sources at 5800 K and 300 K?
Answers: (a) 0.154, (b) 0.89
We need at least 10 more requests to produce the solution.
0 / 10 have requested this problem solution
The more requests, the faster the answer.