The color of visible light is determined by its wavelength, which is the distance between successive peaks of light waves. Different wavelengths correspond to different colors within the visible spectrum, such as blue or red. Understanding this concept helps explain why we perceive a variety of colors from light. ;
The color of visible light is determined by its wavelength. Different wavelengths correspond to different colors seen in the visible spectrum, like blue or red. Therefore, the correct answer is D. wavelength.
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