Which property of visible light determines its color?

• A. Wavelength
• B. Amplitude
• C. Phase
• D. Speed

Answer: (A)

Verified step by step guidance

1. Understand that visible light is an electromagnetic wave characterized by properties such as wavelength, amplitude, phase, and speed.
2. Recall that the color of visible light corresponds to the specific range of wavelengths within the visible spectrum, typically from about 400 nm (violet) to 700 nm (red).
3. Recognize that amplitude relates to the brightness or intensity of the light, not its color.
4. Note that phase refers to the position of the wave in its cycle and does not affect the perceived color.
5. Remember that the speed of light in a vacuum is constant and does not determine color; instead, it is the wavelength that directly determines the color we perceive.