Question

The picture tube of a TV receiver is known as_____________________.
(Visual tube / Cathode ray tube)

Hint:

CRT stands for Cathode Ray Tube, which was widely used in TVs and monitors before flat screens.

Answer 1

The picture tube of a TV receiver is known as a Cathode Ray Tube (CRT). It is a vacuum tube that contains an electron gun and a fluorescent screen. The electron gun emits electrons that are directed and focused into a beam, which strikes the screen coated with phosphor to create images.
This technology was commonly used in older television sets and computer monitors before the advent of LCD and LED screens.