The German-born British physicist Arthur Schuster expanded upon Crookes' experiments by placing metal plates parallel to the cathode rays and applying an electric potential between the plates.
Fisikawan Britania kelahiran Jerman Arthur Schuster memperluas eksperimen Crookes dengan memasang dua pelat logam secara paralel terhadap sinar katode dan memberikan potensial listrik antara dua pelat tersebut.