A TV is made out of a vacuum tube...

...with heated filament cathode. And coated with Phospor.

The majority of televisions today are powered by a Cathode Ray Tube (CRT). The cathode ray tube is polar.

The positive end is called the "anode" and the negative end is the "cathode".

The cathode is a heated filament similar to a light bulb and the ray a stream of electrons that naturally pour off a heated cathode into the vacuum.

The anode then attracts the electrons pouring off the cathode through a tight, high-speed beam.

This beam then hits the screen which is coated with phosphors that glow when struck by the beam.

The beam is controlled by steering coils using different voltages, thus allowing the beam to hit any point on the screen.

In color TV's, there are 3 beams in red, green, and blue which when mixed, can create 256-color images.

White color is produced by mixing all the 3 beams in perfect proportion.

Black is produce simply by turning off all the beam at the particular point or spot.

Sounds complicated? Not quite. It's simple, yet entertaining science.

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