Infrared waves are often called heat waves because they
A) emanate from relatively hot sources.
B) are the predominant waves emitted by the sun.
C) induce resonance in molecules and increase internal energy in a substance.
D) consist of frequencies lower than those of visible light.
E) are absorbed rather than reflected by the skin.

Question

Quizplus · Accepted Answer

Infrared waves are called heat waves because they cause molecules to vibrate, increasing their internal energy and thus raising the temperature of the substance.

Infrared Waves Are Often Called Heat Waves Because They