Physics - Semester 2 - Chapter 27 Key Terms
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| Electromagnetic spectrum | The range of electromagnetic waves extending from radio waves to gamma rays
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| Electromagnetic wave | A wave that is partly electric and partly magnetic and carries energy. Emitted by vibrating electric charges
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| Infrared | Electromagnetic waves of frequencies lower than the red of visible light
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| Light-year | The distance light travels through a vacuum during one year
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| Opaque | Term applied to materials that absorb light without reemission, and consequently do not allow light through them
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| Penumbra | A partial shadow that appears where light from part of the source is blocked and light from another part of the source is not blocked
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| Photon | In the particle model of electromagnetic radiation, a particle that travels only at the speed of light and whose energy is related to the radiation in the wave model
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| Polarization | The aligning of vibrations in a transverse wave, usually by filtering out waves of other directions
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| Ray | A thin beam of light
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| Shadow | A shaded region that results when light falls on an object and this cannot reach into the region on the far side of the object
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| Transparent | Term applied to materials that allow light to pass through them in straight lines
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| Ultraviolet | Electromagnetic waves of frequencies higher than those of violet light
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| Umbra | The darker part of a shadow where all the light is blocked
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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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