On Jul 5, 9:54*pm, Cecil Moore wrote:
On Jul 5, 7:41*pm, Keith Dysart wrote:
After the rising edge goes by, which I assume you will still call an
EM wave, what follows until the falling edge occurs a year later?
Is it an EM wave?

If electrons (carriers) are not being accelerated and/or decelerated,
i.e. if DC steady-state exists, then there are no EM waves.

I detect evasion. Is there a problem providing an answer?

Is what follows the rising edge an EM wave? Or not?

I invite you to view the 15.84e-9 Hz square wave as one year at
a constant value of voltage and current followed by another year
with zero voltage and current, repeated.

Or you can perform the fourier transform and obtain an infinite
number of odd harmonics of the 15.84 nanoHz fundamental.

Does either one of these views assist you with deciding whether
there are EM waves present during the one year intervals where
the signal value does not change?

If the square wave frequency was 1 MHz, would you have the same
difficulty deciding? Why not?

....Keith