Question

What is emissive power of perfectly black body at 1000k

Answer 1

A black body, is an ideal object that perfectly obeys the laws of thermal radiation.

• A black body refers to a thermal radiation-emitting opaque artifact. A perfect black body is one that absorbs and reflects none of the incoming light. Such an object would seem completely black at room temperature
• The emissivity of the black body in thermal equilibrium is ε = 1.0. A source with lower emissivity is often referred to as a gray body, regardless of frequency. Thus, T1 = 1000°C + 273  = 1273 K
• A black body's total emissive power Eb is the total radiant energy released by the black body in all directions over the whole range of wavelengths (λ = 0 – ∞) per unit area per unit time.