Discussion
The vibrations of atoms and molecules produce electromagnetic radiation in the region of
Answer: B
Vibrations of atoms and molecules produce infrared radiation.
The energy gaps between the vibrational levels of molecules correspond to photons in the infrared region. That is why warm bodies emit infrared (heat) radiation and why infrared spectroscopy is used to identify molecular bonds: each bond absorbs at the frequency of its own vibration.
The other regions come from other sources in the standard table of the electromagnetic spectrum. Visible and ultraviolet light come from electrons moving between outer energy levels of atoms, X-rays from inner-shell electrons or from fast electrons being slowed down, and microwaves from devices such as klystrons and magnetrons; molecular rotations also lie in the microwave region.
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