Answer the following question given this paragraph: Human beings and other primates also have the ability to see in color. We have special cells inside our eyes that can distinguish different wavelengths of visible light. Visible light is light in the range of wavelengths that the human eye can sense. The exact wavelength of visible light determines its color. Q: What determines the color of visible light? Choices: - wavelength speed - wavelength density - molecular wavelength - exact wavelength A:
exact wavelength