Question

Older monitors that used a vacuum tube to generate a focused electron light beam are called:

Answer 1

The older monitors that used a vacuum tube to generate a focused electron light beam are called Cathode Ray Tubes (CRTs).

Step-by-step explanation:

The older monitors that used a vacuum tube to generate a focused electron light beam are called Cathode Ray Tubes (CRTs). These CRTs were commonly found in older TVs, computer monitors, and x-ray machines.