On Sun, 12 Sep 2010 22:46:16 -0700 (PDT), lu6etj
wrote:

PSE explain me MISMATCH.

What is the characteristic Z of free space or air?

What is the characteristic Z of Water (plain, with mud, or salty)?

What is the ratio between the two?

How much power in one, transits the interface and proceeds through the
other?

[hint] if not much, it is reflected at the interface.

73's
Richard Clark, KB7QHC