something that can change or vary in an investigation
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pitch
how high or low a note is
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wave
a transfer of energy with no net transfer of mass
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medium
the material through which a wave can travel
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periodic wave
a repetitive series of pulses; a wave sequence in which the particles of the medium undergo periodic motion; that s after a fixed time the medium returns to its starting point then repeats
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crest
the highest point of displacement of a wave
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trough
the lowest point of displacement of a wave
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amplitude
the maximum displacement of a particle as a wave passes the height of a wave crest; it is related to the waves energy
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wavelength
the distance between two identical points of a wave
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frequency
the number of waves produced per unit time
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period
the time required to complete one cycle of a wave
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transverse wave
a wave in which the medium is perpendicular to the motion of the wave
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longitudinal wave
a wave in which the motion of the medium is parallel to the direction of the motion of the wave
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standing wave
a wave pattern that remains in a constant position
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node
a point on a standing wave where the medium is motionless
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antinode
a point on a standing wave where the displacement is the largest
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inverse relationship
a relationship in which decreasing one variable increases the other variable or vise versa
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direct relationship
a relationship in which increasing one variable increases the other or vise versa
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umbra
the part of the shadow that gets no light
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penumbra
the part of the shadow that gets partial light
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angle of incidence
the angle formed between an incident ray and the normal
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angle of reflection
the angle formed between a reflected ray and the normal
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incident ray
the ray of light that strikes a surface
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reflected ray
the yat of light that reflects off a surface
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normal
a line that is perpendicular
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law of relfection
a law for mirrors that states that the angle of incidence is equal to the angle of reflection
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Flashcard (126)