music wiki:
>For other uses, see Music (disambiguation). Music is a natural intuitive phenomenon operating in the three worlds of time, pitch, energy, and under the three distinct and interrelated organization structures of rhythm, harmony, and melody. Since the music phenomenon is natural and intuitive, humans can also virtually perform and hear music in their minds, without even learning or understanding it.Traditionally, one of the major difficulties in defining music has been to use the word to try to describe all activities and things related to music and/or sound. For example, scores only become music through performance(s), or when (recorded) performances are replayed.
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rainbow wiki:
>For other uses, see Rainbow (disambiguation). A rainbow is an optical and meteorological phenomenon that causes a nearly continuous spectrum of light to appear in the sky when the sun shines onto falling rain. It is a multicoloured arc with red on the outside and violet on the inside. The full sequence of colours is most commonly cited as red, orange, yellow, green, blue, indigo, and violet, though it is important to note that this is an inconsistent list; all primary and secondary colours are present in some form, but only one tertiary. It is commonly thought that indigo was included due to the different religious connotations of the numbers six and seven at the time of Isaac Newton's work on light, despite its lack of scientific significance and the poor ability of humans to distinguish colours in the blue portion of the visual spectrum.
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