Science glossary film: Cathode ray

Cathode ray

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Or electron beam, a stream of electrons emitted from the negative terminal of a vacuum tube.

Or electron beam, a stream of electrons emitted from the negative terminal of a vacuum tube. In the classic design, a heated metal coil gives off electrons which are accelerated by a high voltage applied between the front and back ends of the tube. Until flat panel technology was developed, cathode ray tubes were widely used in televisions, computer screens and other displays.

In the classic design, a heated metal coil gives off electrons which are accelerated by a high voltage applied between the front and back ends of the tube. Until flat panel technology was developed, cathode ray tubes were widely used in televisions, computer screens and other displays.

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