Q103
General SciencePhysics
Good absorbers of heat are
- a.poor emitters
- b.non-emitters
- c.good emitters
- d.highly polished
Answer: (C) good emitters
By Kirchhoff's law of thermal radiation, a body's ability to absorb radiation at a given wavelength equals its ability to emit radiation at that wavelength — so good absorbers (typically dull, dark surfaces) are also good emitters, while highly polished, reflective surfaces are poor absorbers and poor emitters.