The Probert Encyclopaedia of Science & Technology

CATHODE-RAY TUBE

A cathode-ray tube is an electron tube containing a thermionic cathode and an electron gun for the production of cathode rays which are directed axially along the tube in the direction of the flattened, wide end. The internal surface of the wider end of the tube is coated with a phosphor which emits light at the point of impact of the high speed electrons.
Research Cathode-ray Tube