system
Given the following post, respond as if you're commenting on Reddit:
human
When we shine a light through coloured plastic/cellophane, the light projected assumes that colour. Does this mean that the photons themselves are being coloured as the pass through the plastic?
gpt
No, it means that light that *isn't* that color is being blocked from passing through.

White light is composed of a very wide variety of wavelengths. You could say it's "all colors."  There is no single wavelength for "white light."