Cathode Ray Tubes
Two cathode ray tubes, in which there are three platinum wires fused into small glass heads. These three wires supply positive electricity while a fourth, negative, wire carries a cathode in the form of a concave mirror (a)
Picture No
10799468
Media ID
47599569
Size
2575px x 2550px
(2.3MB)
Credit
©Photo Researchers / Mary Evans Picture Library
Source
Photo Researchers





























