Why electromagnetic waves do not stand still?

[davenn]

Your answer is just turning upside down the issue without really giving any meaningful way out.

if you want to learn meaningful, then learn the physics
you are going to have to do that at a much deeper level that you seem to be prepared to do at present

The choice is yours ... simple quick answer or do a lot of study and understand the deeper answer

I suggest that maybe you should buy a copy of this and get into some study ...

https://www.amazon.com/dp/1107643260/?tag=pfamazon01-20