Abstract
A simple apparatus for an undergraduate laboratory measurement of the ratio e/m of electrons by Classen's method is described. A flanged metal vacuum chamber contains the electrode system, a filament, two adjustable slits, and a collector. Helmholtz coils supplying the magnetic field are mounted externally. Accelerating potentials of 750 to 1500 v and fields of 60 to 70 gauss are required. The electrode system can be conveniently removed from the chamber for inspection and measurement. When properly adjusted, the apparatus will permit the determination of the ratio e/m to a precision of ±2%.
Full Text 
Sign-in/Register to access full text options
Sign-in/Register to access full text options 
Paper version not known
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
