Still closer to the planet, at a radius of 100,000 kilometers, the brightness of the Jovian ring drops sharply.That happens to be the location of the 2:1 electromagnetic resonance.

• 再更靠近行星一些，于10万公里处，木星环的光度却急遽下降，因为这里刚好就是形成2：1电磁共振之处。