# Summary:

Using the experiment we have detected the following relationships:
• The higher the plate voltage $$V_{\rm{p}}$$ of the capacitor, the bigger the deflection in y-direction.
• The stronger the electric field $$E$$ between the capacitor plates, the bigger the defelction in y-direction.
• The higher the acceleration voltage $$V_{\rm{a}}$$ of the electron gun, the smaller the deflection in y-direction.
• The higher the electron speed $$v_{\rm{0}}$$ when leaving the electron gun, the smaller the deflection in y-direction.