PURPOSE: To demonstrate the deflection of an electron beam by an electric field.

DESCRIPTION: The electron beam starting at the rear of the tube is seen on the front fluorescent screen in the standard way. Applying an electric field on either of the two sets of internal deflection plates causes either horizontal or vertical deflection of the beam.

SUGGESTIONS: Try using charged rods in the vicinity of the neck of the CRT to deflect the beam.

REFERENCES: (PIRA unknown.)

EQUIPMENT: Oscilloscope CRT with built-in electric field supply and charging materials.

SETUP TIME: None.