Answer: absorber and emitter of radiation.
- A absorber and emitter of radiation
- B pure reflector of radiation
- C pure transmitter of radiation
- D pure insulator of radiation
Correct answer: A. absorber and emitter of radiation
Explanation: A black body absorbs all incident radiation and is also the best possible emitter.
During a phase change (melting or boiling), temperature stays constant while heat is absorbed entirely as latent heat (Q=mL); temperature only rises again once the substance is fully in its new phase.
Concept context
Temperature scales, thermal expansion, calorimetry, and the three modes of heat transfer including radiation laws.