In relation to light, what does amplitude indicate?

• A. Color
• B. Frequency
• C. Intensity
• D. Speed

Answer: (C)

Amplitude refers to the height of a light wave and is a key factor in determining the intensity of the light. When discussing light waves, amplitude is directly correlated to how bright or powerful the light appears. Higher amplitude means more intense light, while lower amplitude signifies dimmer light.

The other options relate to different properties of light. Color is determined by the wavelength of the light, frequency refers to how often the light wave cycles per second, and speed pertains to how fast the light travels through different mediums. Understanding amplitude as a measure of intensity helps clarify its role in wave properties, particularly in the context of light and how it is perceived by the human eye.