cathode ray,centimetre

cathode ray tube
cathode ray oscilloscope oocities阴极射线示波器 oocities.
r potential energy u = qv r v( ∞→ r) =v re cathode ray
cathode ray tube (crt) electron guns anode connection electron
1电子的发现ppt 阴极射线 cathode ray 赫兹 h.