Question

What is one important function of the fluorescent screen?

Answer 1

The fluorescent screen helps to capture the images on the screen.
It converts the electrical signal into the visual signal by ionizing the radiations into the light waves

Complete answer:
The main component of the cathode ray tube is an electron gun.
Complete step by step answer:
The crystalline materials having the property of fluorescence are like phosphor or zinc oxide to emit light when stimulated by light radiation. The persistence of the phosphor is the time duration for which the afterglow of phosphorescence occurs.
The screen of the cathode ray tube is coated with a material called phosphor that will emit light when bombarded by electrons. Many possible phosphors differ in color, persistence, efficiency, etc.
The output light of a fluorescent screen is proportional to the number of bombarding electrons that is the beam current and increases approximately as the square of the anode voltage.
The spectral distribution of the light depends upon the base material and the activator. A great variety of colors is available.
Finally, The electrical signal is converted into a visual signal by using the fluorescent screen. The screen produces a bright spot when an electron beam hits the screen. Phosphor is a material that is used to make the fluorescent screen.

Note: The luminance depends on the following factors. Like, The number of bombarding electrons, per second.
The energy of which the bombarding electron strikes on the fluorescent screen.
The CRT has the purpose of converting the electrical signal into the visual signal.