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Section 4 Vocabulary
Physical Science
16
Science
8th Grade
05/26/2009

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Term
Optics
Definition
The study of visible light and the ways in which visible light interacts with the eye to produce vision.
Term
Law of Reflection
Definition
The angle of reflection equals the angle of incidence. 
Term
Regular Reflection
Definition
The reflection of parallel light rays all in the same direction.
Term
Diffuse Reflection
Definition
The reflection of parallel light rays in many different directions.
Term
Image
Definition
A picture of an object formed by waves of light.
Term
Convex
Definition
Curved outward.
Term
Concave
Definition
Curved inward. 
Term
Focal Point
Definition
The point at which the rays meet.
Term
Lens
Definition
A clear optical tool that refracts light. 
Term
Focal Length
Definition
The distance from the center of the lens to the lens's focal point. 
Term
Cornea
Definition
A transparent membrane that covers the eye. 
Term
Pupil
Definition
A circular opening that controls how much light enters the eye. 
Term
Retina
Definition
Specialized cells that respond to light, 
Term
Laser
Definition
A device that produces an intense, concentrated beam of light that is brighter than sunlight. 
Term
Fiber optics
Definition
Technology based on the use of laser light to send signals through optical wires. 
Term
Optical Wires
Definition
Transparent wires.
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