and if they are, to what extent?
chhitiz said:and if they are, to what extent?
chhitiz said:well, if you look at a CRT TV turned off, you just see blackness (and a bit of reflection of the screen), not tiny red green blue dots, so i think, maybe they are transparent.
berkeman said:Look closer with a magifying glass...
chhitiz said:how very stupid of me. another thing, can you tell me if the indivudual particles of phosphor are at micro or nano scale? if they they are nano sized and embedded (closely packed) in a plastic sheet, would it be transparent.
Phosphor sheets are thin layers of material that are used to coat the inside of a cathode ray tube (CRT). They emit light when struck by electrons, allowing for the creation of images on the screen.
No, phosphor sheets are not transparent. They are typically made of a phosphor powder mixed with a binder and applied as a coating, making them opaque.
In CRTs, an electron gun shoots a beam of electrons towards the phosphor sheets on the screen. The electrons collide with the phosphors, causing them to emit light and create the images we see on the screen.
The most common materials used to make phosphor sheets in CRTs are zinc sulfide and cadmium sulfide. These materials are mixed with a binder, such as silicone, to form a paste which is then applied to the inside of the CRT screen.
The quality of the phosphor sheets used in CRTs can greatly impact the image quality. The size and composition of the phosphor particles, as well as the thickness and uniformity of the coating, can affect factors such as brightness, contrast, and color accuracy.