CHAPTER 12
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| wave | an oscillation that travels
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| vibration | a word that means the same as oscillation
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| wave pulse | a short length of wave that travels
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| transverse | a wave where the oscillation is perpindicular to the direction of motion
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| longitudinal | a wave where the oscillation is in the same direction as the direction of motion
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| wavelength | the length of one complete wave
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| natural frequency | a special frequency at which objects vibrate if they are disturbed
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| resonance | a special condition where the frequency you push matches the natural frequency of the system, resulting in large amplitude waves
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| interference | the interaction of two or more waves with each other
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| boundary | a place where a wave changes suddenly
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| reflection | the process of bouncing a wave off a boundary
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| refraction | the process of bending a wave as it crosses a boundary
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| diffraction | what happens when a wave bends around obstacles or through holes
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| absorption | the process where a wave gets smaller and smaller
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| node | a point on a wave where there is no motion
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| antinode | the place on a wave where the amplitude is largest
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| harmonic | a wave whose frequency is a multiple of another wave
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| standing wave | a wave that is trapped between two boundaries
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| harmonic motion | back and forth or repeating motion
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| cycle | a part of motion that repeats over and over
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| system | a group of things we think are important to consider when analyzing something
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| oscillator | a system in harmonic motion
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| hertz | a unit of one cycle per second
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| period | the time it takes to complete one cycle
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| frequency | the number of cycles per second
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| amplitude | the size of a cycle
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| damping | any process that causes cycles to get smaller and smaller in amplitude
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| phase | a way to identify where an oscillator is in its cycle
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Review the information in the table. When you are ready to quiz yourself you can hide individual columns or the entire table. Then you can click on the empty cells to reveal the answer. Try to recall what will be displayed before clicking the empty cell.
To hide a column, click on the column name.
To hide the entire table, click on the "Hide All" button.
You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
To hide a column, click on the column name.
To hide the entire table, click on the "Hide All" button.
You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
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