Multiple choice

Good absorbers of heat are

  1. poor emitters

  2. non emitters

  3. good emitters

  4. highly polished

Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Kirchhoff's law of thermal radiation states that at a given temperature, the emissivity of a surface is equal to its absorptivity. Therefore, any material that is efficient at absorbing heat is also efficient at emitting it.