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Timbre also known as color or tone quantity which is used for music notes sound and tone are mostly know for guitars or pianos .
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Parallel universe, or alternate reality, is a hypothetical self-contained plane of existence, co-existing with one's own
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Explanation:
Galaxies are in constant motion with respect to each other . For example Andromeda galaxy is approaching our galaxy ( milky way ) at about 110 km /s . So we will observe blue shift in the spectrum of radiation coming from this galaxy . In this way, we can distinguish between radiation coming from our galaxy and that coming from other galaxy . Spectrum of radiation coming from other galaxy must have either red or blue shift .
