Because there’s no current in the insulating layer, charge is trapped inside that layer, and the classical laws of physics say that voltage should also measure zero. Just as a tennis ball thrown at a ...

他（杨振宁）对物理学做出了深远而有具有原创性的贡献。特别是他在宇称不守恒以及非阿贝尔规范场理论（杨-米尔斯场的另外一种叫法）的发现，为新的知识结构奠定了基础，而他对数学之美的热爱，帮助他发现了自然界奇妙的运转规律。