The emissive power of a perfectly black body at 300°C, is 6 watt/m². What is the emissive power of another body having emissivity of 0.7 and kept at the s0ame temperature?
A. 2.1 watt/m²
B. 3.00 watt/m²
C. 4.2 watt/m²
D. 3.5 watt/m²
Answer:C
The emissive power of a perfectly black body at 300°C, is 6 watt/m². What is the emissive power of another body having emissivity of 0.7 and kept at the s0ame temperature?
A. 2.1 watt/m² B. 3.00 watt/m² C. 4.2 watt/m² D. 3.5 watt/m²