What is refraction?
ASplitting of white light into its component colours
BBouncing of a light ray off a polished surface
CBending of a light ray's direction at a material boundary
DComplete absorption of light inside a dense material
Answer & Solution
Correct answer: C. Bending of a light ray's direction at a material boundary
1. Refraction is the changing of a light ray's direction when it crosses a boundary between materials of different composition.
2. It is loosely described as the ray bending at that boundary.
3. Bouncing back from a surface is reflection, and splitting white light into colours is dispersion, both distinct from this definition.
_Source: OpenStax Physics (CC BY 4.0), Ch 16 "Mirrors and Lenses", section 16.2 Refraction_
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