Which factor determines the different colors of visible light?

• A. Speed of the light wave
• B. Phase of the light wave
• C. Amplitude of the light wave
• D. Wavelength of the light

Answer: (D)

Verified step by step guidance

1. Understand that visible light is an electromagnetic wave characterized by properties such as wavelength, frequency, amplitude, speed, and phase.
2. Recall that the color of visible light corresponds to its wavelength or frequency within the visible spectrum, typically ranging from about 400 nm (violet) to 700 nm (red).
3. Recognize that the speed of light in a vacuum is constant and does not determine color; instead, color depends on how the wavelength fits within the visible range.
4. Note that amplitude relates to the brightness or intensity of the light, not its color, and phase affects wave interference but not the perceived color.
5. Conclude that the wavelength of the light wave is the key factor that determines the different colors of visible light.