"Yes, light and radio waves are fundamentally the same phenomenon—both are electromagnetic radiation, consisting of oscillating electric and magnetic fields traveling at the speed of light. They are both part of the electromagnetic spectrum, with the primary difference being their frequency, wavelength, and energy levels."
I already knew that, or rather already knew it as a general consensus. That was an ai response to the question "are light and radio waves the same?". My intention being to present this as somehow a radio related matter, as we look at the radio frequency purple.
This isn't new science news, it's old, but this recent Popular Science article does explains it well and I think it's all interesting.
Purple Isn’t Real, Science Says. Your Brain Is Just Making It Up.
https://www.popularmechanics.com/science/a70129575/purple-is-fake-science/
Excerpts:
Red and blue (or violet) wavelengths are two opposite extremes on the spectrum. When you see both of these wavelengths in the same place, you eyes and brain don’t know what to do with them, so they compensate, and the clashing wavelengths register as the color we call purple. It doesn’t actually exist.
... We can only see colors that have wavelengths of the right sizes (between 350 to 750 nanometers) for our cones to respond to. That’s why we cannot make out UV or infrared light—UV wavelengths are too short for our cones to detect, and infrared wavelengths are too long. ...
The brain then determines what color you are looking at by comparing the differences in signal strength, allowing us to see up to a million colors. ....
The problem with purple is that it isn’t supposed to be possible to create a color from wavelengths on opposite ends of the spectrum. The shortest wavelength detection made by your S cones (violet light) has no overlap with the longest wavelength detection made by your L cones (red light).
To compensate, the brain bends the spectrum into a circle, making the two extremes meet at purple. It’s an illusion of physics and neuroscience that makes us think we see a nonspectral color.
Despite the fact that it is technically a figment—more like pigment—of our imaginations, ....
https://www.popularmechanics.com/science/a70129575/purple-is-fake-science/