Chapter 17 vocabulary
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| Mechanical wave | Disturbance in matter that carries energy from one place to another.
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| Medium | The material through which a wave travels.
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| Crest | The highest position of a wave above the rest position.
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| Trough | The lowest point below the rest position.
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| Transverse wave | A wave that causes the medium to vibrate at right angles to the direction in which the waves.
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| Compression | Area where the particles in a medium are spaced close together.
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| Rarefaction | Area where the particles in a medium are spread out.
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| Longitudinal wave | Wave in which the vibration of the medium is parallel to the direction the wave travels.
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| Surface wave | Wave that travels along a surface separating two media.
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| Periodic motion | Any motion that repeats at a regular time intervals.
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| Frequency | The number of complete cycles in a given time.
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| Hertz (Hz) | The unit of measure for frequency, equal to one cycle per second
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| Wavelength | The distance between a point on a wave and the same point on the next cycle of the wave.
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| Amplitude | The maximum displacement of a medium from the rest position.
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| Reflection | The interaction that occurs when a wave bounces off a surface that it cannot pass through
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| Refraction | The bending of a wave as it enters a new medium at an angle.
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| Diffraction | The bending of a wave as it moves around an obstacle or passes through a narrow opening.
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| Interference | The interaction of two or more waves that combine in a region of overlap.
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| Constructive interfernce | The interaction among two or more waves in which displacements combine to produce a wave with a larger displacement.
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| Standing wave | A wave that appears to stay in one place and does not seem to move through a medium.
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| Node | A point on a standing wave that has no displacement from the rest position.
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| Antinode | A point of maximum displacement midway between two nodes in a standing wave
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| Electromagnetic waves | A transverse wave consisting of changing electric and changing magnetic fields.
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| Electric field | A field in a region of space that exerts electric forces on changed particles.
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| Magnetic field | A field in a region of space that exerts magnetic forces.
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| Electromagnetic radiation | The transfer of energy by electromagnetic waves.
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| Photoelectric effect | The emission of electrons from a metal caused by light striking the metal.
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| Photons | A packet of electromagnetic energy.
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| Intensity | The rate at which a waves energy flows through a given unit of area.
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| Electromagnetic spectrum | The full range of electromagnetic radiation.
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| Amplitude modulation | A method of transmitting a radio signal in which the amplitude of the carrier wave varies while its frequency remains the same.
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| Frequency modulation | A method of transmitting a radio signal in which the frequency of the carrier wave varies while its amplitude remains the same.
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| Thermograms | A color-coded picture using variations in infrared radiation to show variations in temperature.
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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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