[Phys-l] physics lessons from wikipedia

[John Denker <jsd@av8n.com>]

Here's a snippet from http://en.wikipedia.org/wiki/Wave_equation :

> Suc waves are generated by a point surce, and they make possible
> sharp sinals Whose form is ltered only by a decreae in amplitude
> as r increases (see an illustration of a sperical wave on the top
> right). Such waves exist only in cases of space with odd dimensions.
> Fortunately, we live in a universe that has three space dimensions,
> so that we can communicate clearly with acoustic and electromagnetic
> waves.

A remarkable conclusion.  I never knew that.

Anybody care to comment?