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| a wave produced by the acceleration of an electric charge and propagated by the periodic variation of intensities |
| the force that acts between bodies of like electric charge or magnetic polarity, tending to separate them |
| line spectrum
An image of colored lines or bands of light formed in optical spectroscopy, each line representing one of the frequencies in the spectrum of a light source. The light source is usually broken into individual bands by a prism or a diffraction grating. |