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.
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…
This question was part of a job interview from a Director of Engineering I had just after I graduated. He told me some of his best answers - I'll post them after you give me your best answers.