The colour of light is determined as

The color of light is determined by its wavelength (Option C). Wavelength refers to the distance between successive crests or troughs of a wave and is inversely related to the frequency of the light wave. In the visible spectrum, shorter wavelengths correspond to colors like blue and violet, while longer wavelengths correspond to colors like red and orange. The human eye perceives these different wavelengths as different colors due to the way our eyes and brain process the light signals received. Amplitude refers to the intensity or brightness of light, while frequency relates to the number of wave cycles per unit of time. Understanding the relationship between wavelength and color is fundamental in fields such as optics, astronomy, and telecommunications, where precise manipulation and measurement of light properties are crucial for practical applications and scientific understanding.