• 2021-04-14
    理想介质(参数为)中有一均匀平面波沿x的方向传播,已知其电场瞬时值表达式为,则与相伴的为。732a1bd84d899120521fb21ce6968308.giffe48c14760558acdc81f992dc6dfa785.gif27111a38ceba3d457861389c3ed16257.gif7546d030b3ab3d4cf7a0e220a2ac2ede.gif