And that is equal to the change in electric flux over time, multiplied by the permittivity of free space constant.

这等于通量随时间的变乘以自由空间的。

You can take our energy density equation and substitute the magnetic field magnitude, B, with the electric field, times the square root of the permittivity constants.

您可以使用我们的能量密度方程，并用场和的平方根时间替换磁场的大小 B。

This equation simplifies down to an equation with two constants, the permittivity of free space for electric fields, epsilon naught, and the permittivity of free space for magnetic fields, mu naught.

该方程具有两个的方程，场的自由空间 epsilon 为零，磁场的自由空间 mu。

I won't blame you if you don't remember, but the permittivity of free space is a constant of proportionally we've used before, that relates electric charge to the physical effect of electric fields.

如果你不提我不会怪你，但自由空间是我们之前使用的相对论，它将荷与场的物理效应联系起来。

Mathematically, this equation says that electric flux is the integral of the electric field over the area of the surface, which is equal to the enclosed charge, divided by the permittivity of free space.

在学上，这个方程表明通量是表面积上场的一个组成部分，它等于闭合荷除以自由空间的。

One way to express capacitance is to divide the area of each plate by the distance between them, and multiply that by a constant – known as the permittivity of free space – denoted by epsilon naught.

表示容的一种方法是将每个极板的面积除以它们之间的距离， 这乘以一个，称为可用空间容差，由 epsilon 注释推断。