Steve Nosko wrote:
"Play with words if U like."

The whole phenomenon is not static. The incident and reflected waves
move. It is their interference patterns, the standing waves, which are
static.

Cecil wisely called them the rms values. I assumed it understood that
the RF (a-c) voltages and currents are expressed as their rms values
unless otherwise specified. Everyone should know that a-c is an acronym
for alternating current which, of course, alternates,

Best regards, Richard Harrison, KB5WZI