| To obtain good colour pictures on a TV screen, you need phosphors that produce rich, pure primaries. |
| Cerium is also used in the manufacture of lasers and phosphors used in cathode ray tubes. |
| First, the quality of the phosphors available in the early days was not that great, and the dots would start to fade out before the entire screen could be painted. |
| Fluorescent materials can be synthetic, such as phosphors, or occur in nature, for example, fluorescent minerals. |
| In a cathode-ray tube display, a scanning electron beam causes phosphors to glow at selected spots. |
| Other particles containing yttria and some lanthanides are phosphors that be processed to form light-emitting devices. |
