This lets you come up with the energy density terms that encapsulate the energy in both fields, with fewer variables.

这使您可以提出能量密度术语，将能量封装在两个域中，变量更少。

Then, you can combine the energy density for both fields, solving for the total energy per unit volume within the wave overall.

然后，您可以结合两个场的能量密度，求解一般波内每单位体积的总能量。

These electromagnetic waves are a type of transverse wave, which means both fields, electric and magnetic, act in directions that are perpendicular to the direction in which the wave is moving.

这些电磁波是一种横波，这意味着电场和磁场都在垂直于波移动方向的方向上运行。