where k = (kx,ky,kz),
to show that kXE=wB.
So I’m mainly fine with the method. I can see the maxwell’s equaion ∇XE=-dB/dt, is the equation required.
And using ∇XE=ikXE, , the result follows.
My question is identifying equation . How do you deduce this? Is it supposed to be obvious in any way. (I’ve done a check on the LHS and RHS so I can see its true), but should this be obvious?
Thanks in advance for your assistance .