Q. 40% of incident radiant energy on the surface of a thermally transparent body is reflected back. If the transmissivity ofthe body be 0.15, then the absorptivity of surface is (Solved)
1. 0.45
2. 0.55
3. 0.40
4. 0.75
- a. 0.45
1. 0.45
2. 0.55
3. 0.40
4. 0.75