Which of the following statements are correct for a blackbody?
1. A blackbody continues to emit radiation even when it is in thermal equilibrium with its surroundings.
2. A blackbody is a perfect emitter.
3. Absorptivity, α = 1 represents a black surface.
1
1 and 2 only
2
1 and 3 only
3
1, 2 and 3
4
2 and 3 only