Visible spectrum in context of electromagnetic spectrum:

https://sites.google.com/a/coe.edu/principles-of-structural-chemistry/relationship-between-light-and-matter/electromagnetic-spectrum

2 episodes left after this one. Conspiracy theorists are interested in what is beyond the visible spectrum. We are yet to define the red for any electromagnetic spectrum besides visible. The visible spectrum is mainstream the way viewership is. Gravity is information. Hitler was a popular perception. Spectrums are apparitional like ghosts. Imagination is hallucination. We use spectrums as canvases to project what we image. People receive readings and visions just by looking around.