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Enderle ch. 27 voc.
chapter 27 vocabulary
Question | Answer |
---|---|
in the particle model of electromagnetic radiation,a particle that only travels at the speed of light and whose energy is related to the frequency of the radiation in the wave model | Photon |
the distance light travels through a vacuum in one year | Light Year |
a wave that is partly electric and partly magnetic and carries energy. Emitted by vibrating electric charges | Electromagnetic Wave |
the range of electromagnetic waves extending from radio wave to gamma-rays. | Electromagnetic Spectrum |
electromagnetic waves of frequencies lower than the red end of visible light | Infrared |
electromagnetic waves of frequencies higher than those the violet end of visible light | Ultraviolet |
term applied to materials that allow light to pass through in straight lines. | Transparent |
term applied to materials that absorb light without reemission and consequently do not allow light to pass through | Opaque |
a thin beam of light | Ray |
a shaded region that light that results when light falls on an object and thus cannot reach into the region on the far side of the object | Shadow |
the darker part of the shadow where all the light is blocked | Umbra |
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 |
the aligning of vibrations in a transverse wave, usually by filtering out waves of other directions. | Polarization |