Richard Harrison wrote:

Dave Shrader wrote:
"If standing waves don`t exist then violins---and other stringed
instruments don`t work!"

True. Terman shows the details of a "standing-wave detector for a
coaxial line." on page 105 of his 1955 edition. It`s a slotted (trough)
line.

Without a reflected wave there would be no interference pattern which as
Dave points out can be observed with the naked eye in some stringed
instruments, especially with the help of a good photographic series.

A frequency adjustable strobe light can also be useful for demonstrating
the effect.

73, Jim AC6XG