Which of the following best describes what white light is made up of?

• A. Only ultraviolet and infrared radiation
• B. A single wavelength of light
• C. Only red and blue wavelengths
• D. A mixture of all visible wavelengths of light

Answer: (D)

Verified step by step guidance

1. Understand that white light is not a single wavelength but a combination of multiple wavelengths of light.
2. Recall that visible light consists of a spectrum of colors, each corresponding to different wavelengths ranging approximately from 400 nm (violet) to 700 nm (red).
3. Recognize that white light is formed when all these visible wavelengths are combined together, producing the perception of white.
4. Note that ultraviolet and infrared radiation are outside the visible spectrum and do not contribute to the color white as perceived by the human eye.
5. Conclude that the best description of white light is that it is a mixture of all visible wavelengths of light.