| electron gun
A color monitor is based on a cathode
ray tube, or CRT. This tube is made up of three electron guns that produce
a stream of electrons, each of which causes a red, green, or blue phosphor
to light up. Controlled by electromagnetism, the electron guns sweep
across the screen, their strength varying so that a colored image is
drawn. Different colors are created by the additive color mixing of the
red, green, and blue phosphors. |