what causes striation patterns? (1 Viewer)

[04er]

Originally posted by Giant Lobster
again, with that speed gain theory, it doesnt explain why striations occur

oh really? What doesn't it explain?

 

[Xayma]

Originally posted by 04er
oh really? What doesn't it explain?

Why the electrons collide with gas particles at the same time. Striation patterns have depth which means electrons are hitting gas particles at different times.

The ones closest to the cathode will then gain velocity before the others so by the end of the anode one would expect that the striation patterns get wider (as the velocity difference will be greater)

 

[enter~space~cap]

if millions of electrons are in the tube at any instant, and their velocities are all different, assuming that they do need to reach a certain speed before passing energy onto atoms, they will do so in no specific pattern. The result being light emitted homogeneously, instead of in stripes. That's what i dont get.

The velocities for all electrons will almost be the same i think since they are all being emitted from the same cathode material and with the same potential difference applied to it.

 

[Xayma]

Yes but they all dont strike the first air particle at the same time.

So when they start accelerating again they have different velocities.