Re: waves cannot exists without medium


solar plexus wrote:
> electric fields orthogonal on magnetic fields or viceversa
>
> EM fields
>
> which are vector fields
>
> well, a vector field requires a preexisting scalar function
> or somthin, which have to be
> non-zero differentiable in at least
> 2 dimensions

This is not true. In fact, it is only a very special class of vector
fields that satisfy this criterion. The very presence of a vector field
does not demand this. Where did you get that idea?


PD

>
> what are these non-zero differentiable scalar functions or
> whatever?

.