"Gary Coffman" wrote in message
...
On Wed, 21 Jul 2004 17:17:18 -0700, Sunworshipper
wrote:
On Tue, 20 Jul 2004 05:11:05 -0400, Gary Coffman
wrote:

As to why lead blocks radiation, it is a very dense material.

Excellent explanation Gary. I would only add to your explanation that
materials used to shield radiation do not "block" it, as in completely stop
all of it, they attenuate it. Now for all practical purposes, if you put
enough of anything between you and a source, there will be so much
attenuation that you would probably never be able to measure any amount of
radiation but one or two of those little zoomies will still make it thru.

Shawn