Shared Flashcard Set

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Chapter 12
Sound and Light
16
Science
10th Grade
03/13/2008

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Cards

Term
pitch
Definition
the perceived highness or lowness of a sound, depending on the frequency of sound waves
Term
ultrasound
Definition
any sound consisting of waves with frequencies higher than 20 000 Hz
Term
infrasound
Definition
any sound consisting of waves with frequencies lower than 20 Hz
Term
resonance
Definition
an effect in which the vibration of one object causes the vibration of another object at a natural frequency
Term
sonar
Definition
a system that uses reflected sound waves to determine the distance to, and location of, objects
Term
photon
Definition
a particle of light
Term
intensity
Definition
the rate at which light or any other form of energy flows through a given area of space
Term
radar
Definition
a system that uses reflected radio waves to determine the distance to, and location of, objects
Term
light ray
Definition
a model of light that represents light traveling through space in an imaginary straight line
Term
virtual image
Definition
an image that forms at a point from which light rays appear to come but do not actually come
Term
real image
Definition
an image of an object formed by many light rays coming together in a specific location
Term
total internal reflection
Definition
the complete reflection of light at the boundary between two transparent mediums when the angle of incidence exceeds the critical angle
Term
lens
Definition
a transparent object that refracts light rays, causing them to converge or diverge to create an image
Term
magnification
Definition

a change in the size of an image compared with the size of an object

Term
prism
Definition

a transparent block with a triangular cross section

Term
dispersion
Definition

an effect in which white light separates into its component colors

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