Question

Inside surface of solar cooker is painted black because

• A. Black surfaces being good conductor of radiation emit more heat
• B. Black surfaces emits heat
• C. Black surfaces being good conductor of radiation absorb more heat
• D. None of the above

Answer 1

Answer: (C)

Black surfaces being good conductor of radiation absorb more heat

Black surfaces are excellent absorbers of radiation and helps in trapping more heat inside a solar cooker, hence improving the efficiency.