McSweeney Word Scramble
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| Question | Answer |
| 1. In the particle model of electromagnetic radiation, a particle that travels only at the speed of light and whose energy is related to the frequency of the radiation in the wave model. | Photon |
| 2. The distance light travels through a vacuum during one year. | Light Year |
| 3. A wave that is partly electric and partly magnetic and carries energy. Emitted by vibrating electric charges. | Electromagnetic Wave |
| 4. The range of electromagnetic waves extending from radio waves to gamma rays. | Electromagnetic Spectrum |
| 5. Electromagnetic waves of frequencies lower than the red of visible light. | Infrared |
| 6. Electromagnetic waves of frequencies higher than those of violet light. | Ultraviolet |
| 7. Term applied to materials that allow light to pass through them in straight lines. | Transparent |
| 8. Term applied to materials that absorb light without reemission, and consequently do not allow light to pass through them. | Opaque |
| 9. A thin beam of light. | Ray |
| 10. A shaded region that results when light falls on an object and thus cannot reach into the region on the far side of the object. | Shadow |
| 11. The darker part of a shadow where all the light is blocked. | Umbra |
| 12. 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. | Penumbra |
| 13. The aligning of vibrations in a transverse wave, usually by filtering out waves of other directions. | Polarization |
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mcsweeney
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