What color is an electron?

Here's a picture of an electron beam outwards from the negative grid of my Fusor.  The vacuum was about 50 micron at the time.

So, are the electrons blue, or just the residual nitrogen ions lighting…

Electrons emit light (photons) when they change valence state. This is physics. So it depends on the element and the state change.

Clem

The electron’s color is in a state of superposition just like Shrödinger’s cat. It is all colors simultaneously until we interact with it in which case it usually turns out to be red with irritation at…