system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: If Radio Waves have a lower frequency than visible light, how can radio waves penetrate through surfaces that visible light can't penetrate through?
gpt
Hey! Photovoltaics lab scientist here. Light of any sort (radio, visible, xrays, etc) will keep moving until it interacts with something.

The thing is, light has funny rules for how it interacts with objects. Each object (really, each different type of material) basically has an “energy toll” that the light must “pay” in order to interact. 

Radio waves, like you say, have much less energy than visible light (lower frequency = lower energy). In fact radio waves have so little energy, they can’t afford to pay the energy “toll” of any material out there.

Can’t pay the energy toll? Can’t interact. No interaction? You’ll never stop. So, radio waves are very good at traveling long distances without being stopped.