Why Do Molecules Become IR-Active

question 69

Multiple Choice

Why do molecules become IR-active?

• A) Because they are in constant motion.
• B) Because they can absorb IR radiation (a photon of a specific wavelength in the IR region) because their dipole moments constantly change as the bond lengths change.
• C) Because they vibrate at low temperatures.
• D) Because their net dipole is zero.
• E) Because they are very close together.

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Definitions:

Stratum Spinosum

A layer of the epidermis situated just above the basal layer, known for its spiny appearance under a microscope.

Stratum Basale

The deepest layer of the epidermis, responsible for generating new skin cells.

Stratum Granulosum

A layer of the epidermis found just above the stratum spinosum, characterized by keratinocytes undergoing keratinization.

Eponychium

The small band of skin at the base of the fingernail or toenail, also known as the cuticle.