Ef-1 The Maltese Cross
Published: Tuesday 14 March 2006 - Updated: Tuesday 29 March 2011
To demonstrate that
a) cathode rays are emitted from the cathode and travel in straight lines and
b) cathode rays will not penetrate a thin sheet of metal.
- The Maltese cross tube
- Induction coil and D.C. Powerpak
Click on pictures to enlarge.
The apparatus consists of an evacuated tube containing a tiltable metal shield in the shape of a cross. The electron beam produces a shadow of the cross on the glass.