Mike Monett wrote:

How about analyzing a vibrating string? If you play guitar, there's a very
nice note you can make by plucking a high string, then putting your finger
at exactly the correct spot and removing it quickly. The note will jump to
a much higher frequency and give a much purer sound. Clearly, the
mechanical energy has split into two waves that cancel at the node.

In principle, you could show the node is stationary, thus contains no
energy. But there is energy travelling on both sides of the null point -
you can hear it.

You can also create other notes by touching different spots on the
vibrating string. These create standing waves with energy travelling in
both directions, but cancelling at the null points. Very similar to
transmission lines.

Regards,

Mike Monett

Sounds like a great idea. I'll look forward to seeing your analysis.

Roy Lewallen, W7EL

Roy Lewallen wrote:

Mike Monett wrote:

[...]

Sounds like a great idea. I'll look forward to seeing your analysis.

Roy Lewallen, W7EL

LOL! I stopped playing guitar years ago!

Regards,

Mike Monett