helmingway
And now we have claims of photons travelling down pieces of copper. I guess that would be responsible for creating a truly holographic imaging experience. No wonder this topic always sparks controversy.
All electromagnetc waves are comprised of photons. I.e., not only is visible light on the electromagnetic spectrum made of photons, but also X- rays, gamma rays, HF radio waves, SHF radio waves - everything on the electromagnetic spectrum. Including audio signals. They’re all photons.