First, How do TV's show all of the colors?
TV's have three tubes of electron beams, when the beams or tubes are turned on or off, this adjusts the brightness of the primary colors. (There are color tubes all over the screen that hold the primary colors in them. These three colors can be mixed together to display other colors)
How does a TV remote work?
Remotes work by using infrared lights. Infrared lights produce diodes which are lights flashing over a thousand times a second. The remote receiver on a TV or VCR can identify the change in the room light versus the infrared lights, then takes the signal as a command and responds by changing the channel of fast forwarding or by doing what ever button you pushed.
Definition of electron beams: A cathode ray tube thats lets electrons out into a electromagnetic apparatus that controls the stream of the electrons.
Definition of infrared: Very fast light that is invisible to the human eye but can be picked up by devices like TV's.
