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Waves Vocab #2
7th Grade GT Mr. Rowland Pd 4/5 4/12/2012
16
Physics
7th Grade
04/12/2012

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Term
Frequency
Definition
the number of repetitions in a given interval of time
Term
Hertz (Hz)
Definition
Unit of measurement for frequency
Term
Sound
Definition
Longitudinal waves produced by the vibration of a material
Term
Loudness
Definition
perception of the intensity of sound
Term
Pitch
Definition
how high or low sond frequencies appear to be
Term
Pendulum
Definition
consisits of a body suspended by from a fixed support so that it swings freely back and forth under the influence of gravity
Term
Ray
Definition
straight line used to represent a light wave
Term
Whitelight
Definition
all the colors of the spectrum visible to the human eye as a single color
Term
Reflection
Definition
the bouncing back of a wave when it hits a surface through which it cannot pass
Term
Refraction
Definition
the change in velocity and apparent bending of the beam of light or other wave-form as it passes from one medium into another
Term
Refracted Ray
Definition
the bent light ray after the wave enters a medium
Term
Normal
Definition
a line drawn perpendicular to the surface at the point where the incoming wave strikes the surface
Term
Light
Definition
a form of electromagnetic radiation with a wavelength visible by the eye
Term
Angle of Reflection
Definition
the angle between the normal (perpendicular drawn to the surface) and the reflected ray
Term
Incident Ray
Definition
the wave of light moving towards the surface at an angle
Term
Angle of Incidence
Definition
the angle between the normal (perpendicular drawn to the surface) and the incident ray
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