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Characteristics of waves: Chapter 9 Physical science
Terms in this set (41)
A disturbance that transfers energy from place to place
Frequency is measured in units called
Mechanical waves are classified according to
how they move
Mechanical waves are created when a source of energy causes a medium to
Refraction occurs when a wave
enters a new medium at an angle
The bending of waves around the edge of a barrier is known as
The bending of waves due to a change in speed is called
The distance between two corresponding parts of a wave is the wave's
The highest points of a transverse wave are called
The interaction between two waves that meet is called
The maximum distance that the particles of a medium move from the rest position is the
amplitude of the wave
The speed of a wave is its wavelength multiplied by its
Waves combine to make a wave with larger amplitude in a process called
Waves combine to produce a smaller or zero-amplitude wave in a process called
Waves that move the particles of the medium parallel to the direction in which the waves are traveling are called
What are the highest and lowest points on a standing wave called?
What occurs when vibrations traveling through an object match the object's natural frequency?
When a wave moves through an opening in a barrier, it
bends and spreads out
When an incoming wave combines with a reflected wave in such a way that the combined wave appears to be standing still, the result is a
Why do you see lightning from a distant storm before you hear thunder?
Light travels faster than sound
___ is an increase in the amplitude of a vibration that occurs when external vibrations match an object's natural frequency.
___ occurs when a wave goes around the edge of a barrier.
A mechanical wave is created when a medium ___, or moves back and forth or up and down.
As the frequency of a wave traveling at constant speed increases, its ____________________ decreases.
In ____________________ interference, the energy of the combined wave is greater than the energy of each of the two waves.
In a longitudinal wave moving along a spring, areas where the coils are farthest apart are called ___.
Refraction occurs because the two sides of a wave that enter a new medium at an angle travel at different ___.
The crests and troughs of a standing wave are called
The material through which a wave travels is called
The more ____________________ a mechanical wave has, the greater its amplitude.
The spreading out of waves after they pass through a narrow opening is ___.
In what direction does the medium move relative to the direction of the wave? Explain. (2)
The medium moves perpendicular, or at right angles to the wave, the rope moves up and down vertically and the wave moves horizontally
What does point C represent?
What does the direction of arrow B indicate?
Direction in which the wave moves
What does the person transfer to the rope by pulling it up and down at point A?
What is the medium through which the wave is moving?
What kind of wave is being generated?
Name and describe the parts of the wave labeled A and B. (4)
The part labeled A is compressed while then in part B it is rarefaction
What type of mechanical wave is produced by the action of this coiled spring?
A longitudinal wave
What causes refraction?
When a wave enters a new medium at an angle, one side of the wave changes speed before the other side. Because different parts of the wave travel at different speeds, the wave bends, or refracts
Describe how wavelength and amplitude are determined in a transverse wave.
Wavelength is a measure the distance between the two corresponding parts of a wave. For example, in transverse waves, you might measure the distance from one crest to the next or from one trough to the next. Amplitude is the maximum distance a medium vibrates from rest position. In a transverse wave, amplitude is the height of the crest.
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