Answers

2015-09-03T22:34:46+08:00
Different colors are emitted because of dispersion or breaking of white into different colors, specifically ROYGBIV just like what is seen in rainbows
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2015-09-05T21:46:46+08:00
The different colors in the visible spectrum are emitted because/when light either slows diwn to a lower frequency or higher in frequency to create a different color, once the frequencies exceed its limit though the light enters a different spectrum
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