In cathode ray experiment, why the pressure was decresed insiside the cathode tube and why the wall of the cathode tube illuminating?
![Cathode Ray Tube Diagram Construction (CRT, Cathode rays, electrons, experiment) Illustration Stock | Adobe Stock Cathode Ray Tube Diagram Construction (CRT, Cathode rays, electrons, experiment) Illustration Stock | Adobe Stock](https://as2.ftcdn.net/v2/jpg/03/33/65/37/1000_F_333653706_wlH2NSQMCr5CHzAb2xZUIhylloIkFhX1.jpg)
Cathode Ray Tube Diagram Construction (CRT, Cathode rays, electrons, experiment) Illustration Stock | Adobe Stock
![electricity - Where are the electrons of a cathode ray tube coming from when using AC? - Physics Stack Exchange electricity - Where are the electrons of a cathode ray tube coming from when using AC? - Physics Stack Exchange](https://i.stack.imgur.com/gQGL2.png)
electricity - Where are the electrons of a cathode ray tube coming from when using AC? - Physics Stack Exchange
![Tube Cathodique Vecteurs libres de droits et plus d'images vectorielles de Tube cathodique - Tube cathodique, Cathode, Tube - iStock Tube Cathodique Vecteurs libres de droits et plus d'images vectorielles de Tube cathodique - Tube cathodique, Cathode, Tube - iStock](https://media.istockphoto.com/id/674704874/fr/vectoriel/tube-cathodique.jpg?s=170667a&w=0&k=20&c=bxQ5NO7sLvcf_-wdwkD3YO8Ek4gcr6UOanGGyDYWlic=)