Concept:The nature of a surface determines how it absorbs and emits thermal radiation; good absorbers are also good emitters, and poor absorbers are also poor emitters.
Explanation:A highly polished silvery surface reflects nearly all incoming radiation instead of absorbing it.
Therefore, it is a poor absorber of radiation.
According to the principle that a good absorber of radiation is also a good emitter, a poor absorber must likewise be a poor emitter.
Since polished silvery surfaces absorb very little radiation, they also emit very little radiation.
Thus, the correct description is that they are poor absorbers and poor emitters.
Answer:A. poor absorbers and poor emitters of radiation