Q. Pick out the wrong statement. (Solved)
1. The emissivity of a surface decreases, if it gets corroded by atmospheric environment
2. The emissivity of a surface increases with increase in surface roughness
3. The emissivity of a polished surface is quite low
4. The emissivity of a non-metallic surface decreases with increase in the temperature
- a. The emissivity of a surface decreases, if it gets corroded by atmospheric environment