Objective: Demonstrate the straight-line propagation of electrons in the absence of any field
Straight-line propagation of electrons in the absence of a field can be demonstrated in a Maltese-cross
tube by showing how the shadow of the electron beam coincides with the shadow due to a light beam.
Any deviation from the straight-line propagation of the beam, due to a magnetic field for example, can
be seen since the shadow is then caused to move.
![Experiment: Maltese-Cross Tube, Basic equipment (115 V, 50/60 Hz), 8000659 [UE3070300-115], Electron tubes](/imagelibrary/UE3070300-115/UE3070300-115_01_Experiment-Maltese-Cross-Tube-Basic-equipment-115-V-5060-Hz.jpg)
![Experiment: Maltese-Cross Tube, Basic equipment (115 V, 50/60 Hz), 8000659 [UE3070300-115], Electron tubes](/thumblibrary/UE3070300-115/UE3070300-115_01_1200_1200_Experiment-Maltese-Cross-Tube-Basic-equipment-115-V-5060-Hz.jpg)
![Experiment: Maltese-Cross Tube, Supplement (115 V, 50/60 Hz), 8000661 [UE3070300S-115], Electron tubes](/thumblibrary/UE3070300S-115/UE3070300S-115_01_140_140_Experiment-Maltese-Cross-Tube-Supplement-115-V-5060-Hz.jpg)