4.6.3.1 Emission and absorption of infrared radiation

Spec reference: 4.6.3.1 (physics only).

Triple-only content in this dot

• All bodies emit and absorb infrared; hotter objects emit more per second.
• Perfect black body as ideal absorber/emitter concept.

Exam quick-check

• Can I identify this as a triple-only point from wording in the question?
• Can I apply the correct equation/idea with units and a clear conclusion?