Which surface is the best thermal emitter and absorber: shiny smooth, dull dark, transparent thin or polished white?
حرارتی اشعاع کی اچھی جاذب و خارج کنندہ سطح: چمکیلی، سیاہ بے چمک، شفاف پتلی یا سفید پالش؟
Solution & explanation
A dull dark surface is the intended answer, especially dull black for infrared in this school model.
Independent study answer. Original textbook ↗ · English-medium printed page 30.