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IPC final fall DC
IPC final ch 12
16
Science
9th Grade
12/17/2013

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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 compete 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
component colors
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