Cathode Ray Tube for Showing Straight Electron Ray Tracks (J02454)

This Crookes tube or Maltese cross tube demonstrates that cathode rays travel in a straight line, and can be blocked by metallic objects. The cross in this Crookes tube can actually lie down and stand up (mechanically). When the cross lies down, the glass face of the tube emits a green glow when the electrons strike the glass wall. When it's in the upright position, you will see the shadow of the cross