The sunset often has a reddish-orange color. This is attributed to which phenomenon? A. Polarization B. Diffraction C. Dispersion D. Refraction Which of the following statements is not true? A. Wavelength of visible light > wavelength of microwaves B. Frequency of radio waves < frequency of infrared waves C. Wavelength of x-rays > wavelength of gamma rays D. Frequency of ultraviolet > frequency of infrared

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