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Lindemann chapter 27
Question | Answer |
---|---|
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 of the wave model. | photon |
the distance light travels through a vacuum during 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 waves to gamma rays | electromagnetic spectrum |
electromagnetic waves of frequencies lower than the red of visible light | infrared |
electromagnetic waves of frequencies higher than those of violet light | ultraviolet |
term applied to materials that absorb light without reemission and do not allow them through | opague |
a thin beam of light | ray |
a shaded region that results when light falls on an object and thus cannot reach into the region of the far side of the object | shadow |
a darker part of a shadow where all the light is blocked | umbra |
a partial shadow that appears where light from part of the source is blocked and light from the 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 |
term applied to material that allows light to pass through them in a straight line | transparent |