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The Basic Principles Of surround sound system

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Refraction effects are according to the fact that light travels much more gradually in a denser medium. The ratio of the velocity of light in air to its velocity during the medium is called the refractive index with the medium for light of a particular colour or wavelength. The refractive https://powerline61470.digitollblog.com/29690419/the-best-side-of-ham-radio

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