what is difference between fluroscent screen and phosphoroscent screen used in cathode ray experiment by jj thomson and what is the function of vaccum pump
Fluorescent screen in the cathode ray experiment helps to identify the negatively charged electrons falling on the screen, ie they move towards the respective electrode producing some glow on the fluorescent screen. Phosphorescent screen helps for the persistence of the image.
The vacuum pump helps to produce a less pressure in the tube in the range of 10-4 mm of Hg.
The vacuum pump helps to produce a less pressure in the tube in the range of 10-4 mm of Hg.