BPK 407 Lecture Notes - Lecture 6: Cathode Ray Tube, Reflex Arc, Oscilloscope
26 Aug 2016
School
Department
Course
Professor
Document Summary
A cathode ray tube enables the visualization and photography of electrical potentials; the cathode-ray oscilloscope permits the very fast voltage changes recorded in tissue to be displayed on a linear time scale. The cathode-ray tube contains an electron beam generator whose output passes through zones where it may be deflected by potentials applied to plates. There are two sets of plates oriented at right angles to one another. The deflections in the horizontal planes are called x deflections and in the vertical plane y deflections. The electron beam, after passing through the deflection zones, travels to the flat far end of the tube. There, a surface coated with a material called. Phosphor emits visible light when the electron beam impinges on it. Phosphor properties affect color and the length of time the phosphor will glow after the electron beam has ceased to activate it.
