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Optics
waves
22
Science
8th Grade
04/21/2009

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Term
Concave Mirror
Definition
curved mirror for which the center is behind the outer edges; the mirrored surface is cured inward
Term
Convex mirror
Definition
curved morror for which the center protrudes out beyond the outer edges; the mirrored surface is curved outward
Term
Vertex
Definition
the point at which the principal axis meets a mirror
Term
Focal Point
Definition
of a mirror or lens is the point at which converging light rays meet or form which light rays diverge
Term
Law of Reflection
Definition
the angle of reflection of a light is equal to the angle of incidence
Term
Angle of reflection
Definition
the angle between the reflected ray and the normal
Term
Angle of refraction
Definition
the angle between normal and the refracted ray
Term
Angle of incidence
Definition
the angle between the incident ray and the normal
Term
Reflected ray
Definition
The ray leaving a reflecting surface after an imcoming ray has struck the surface
Term
Refraceted ray
Definition
a ray that describes the direction of light after passing from one medium to another of different density
Term
Principal axis
Definition
a line that is normal,or perpendicular, to the center of a mirror or lens
Term
Plane mirror
Definition
a flat, smooth mirror, or reflecting surface
Term
Incident ray
Definition
a ray that strikes a reflacting or refracting surface
Term
Normal
Definition
an imaginary line perpendicular toa surface such as a mirror or lens
Term
Amplitude
Definition
the distance between the highest point on a wave(crest)or
the distance between the lowest point on a wave(trough)
Term
Crest
Definition
the highest part of the wave
Term
energy
Definition
the capacity to apply force over a distance
Term
Trough
Definition
the lowest part of a wave
Term
Refaction
Definition
the changing of direction or bending of lights or other type of wave when travelling from one medium to another medium having a different density
Term
Reflection
Definition
the process in which light or another type of wave interacts with a surface and is sent back from the surface
Term
Pythagoras
Definition
a greek philosopher who belived that light beams were made up of tiny particles
Term
Telescope
Definition
a device used to magnify distance objects, composed of a comdination of lenses or mirrors
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