system
Given the following post, respond as if you're commenting on Reddit:
human
Does infrared light penetrate copper?

If I place a copper plate above my head in broad daylight, the place will block visible light and I will be in its shade; but what about infrared or ultraviolet light, do they penetrate the plate?
gpt
No. Light is basically a changing electromagnetic field. Good conductors, such as copper, will react to that by moving electrons around, which will end up reflecting the light. Thus, they reflect light of all wavelengths. At least until you get to the really high energy stuff that's better thought of as particles instead of waves.