# Shared Flashcard Set

## Details

Chapter 29: Reflection and Refraction Vocabulary
Reflection and Refraction Vocabulary
15
Physics
07/20/2012

Term
 reflection
Definition
 The bouncing back of a particle or wave that strikes the boundary between two media.
Term
 normal
Definition
 A line perpendicular to a surface
Term
 angle of incidence
Definition
 Angle between an incident ray and the normal to a surface.
Term
 angle of reflection
Definition
 Angle between a reflected ray and the normal to a surface.
Term
 law of reflection
Definition
 The angle of incidence for a wave that strikes a surface is equal to the angle of reflection. This is true for both partially and totally reflected waves.
Term
 virtual image
Definition
 An image formed through reflection or refraction that can be seen by an observer but cannot be projected on a screen because light from the object does not actually come to a focus.
Term
 diffuse reflection
Definition
 The reflection of waves in amy directions from a rough surface.
Term
 reverberation
Definition
 Persistence of a sound, as in an echo, due to multiple reflections.
Term
 refraction
Definition
 The change in direction of a wave as it crosses the boundary between two media in which the wave travels at different speeds.
Term
 wave front
Definition
 The crest, trough, or any continuous portion of a two-dimensional or three-dimensional wave in which the vibrations are all the same way at the same time.
Term
 mirage
Definition
 A floating image that appears in the distance and is due to the refraction of light in Earth's atmosphere.
Term
 dispersion
Definition
 The separation of light into colors arranged according to their frequency, by interaction with a prism or diffraction grating, for example.
Term
 critical angle
Definition
 The minimum angle of incidence for which a light ray is totally reflected within a medium.
Term
 total internal reflection
Definition
 The 100% reflection (with no transmission) of light that strikes the boundary between two media at an angle greater than the critical angle.
Term
 optical fiber
Definition
 A transparent fiber usually of glass or plastic, that can transmit light down its length by means of total internal reflection.
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