I remember being told in some physics class that visible light is actually the radiation which penetrates the most, and that indeed this may be the very reason why it's visible: eyes were developed when life was still aquatic, therefore they evolved to be sensitive to the range of frequencies that could reach them.
I remember being told in some physics class that visible light is actually the radiation which penetrates the most, and that indeed this may be the very reason why it's visible: eyes were developed when life was still aquatic, therefore they evolved to be sensitive to the range of frequencies that could reach them.