The new CDX-GS500R CD receiver features Sony's new App Remote technology for iPhone, while the new CDX-GT710HD model includes HD radio technology and a dynamic color illuminator for different light effects.

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Usually not by much, but enough to give us things like color, which is a result of our perception different wavelengths of light being scattered by objects or media or both.

FORBES: Slowing the Speed of Light to a Crawl

Also, color photographs could be achieved by using several sheets that capture different hues of light.

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