[LINK] Our future Generation being looked after by our Government

[Paul Brooks]

On 1/02/2013 2:16 PM, tomk wrote:
> On 1/02/2013 10:49 a.m., grove at zeta.org.au wrote:
>> On Fri, 1 Feb 2013, Paul Brooks wrote:
>>
>>> On 1/02/2013 11:09 AM, Michael Skeggs mike at bystander.net wrote:
>>>> And to bring it back to the list topic, I was surprised and impressed when
>>>> my 11yro returned from her first day of high school yesterday to tell me
>>>> they had learnt binary in Maths.
>>> Similarly, I was very impressed when my 9yo came home from school, spotted the new
>>> webcam I had perched on the monitor, and was aghast that it didn't have a privacy
>>> shutter that could be put across the lens when not in use.
>>> He wouldn't leave until it had a post-it note stuck across it, after several weeks of
>>> cyber-safety sessions at school.
>>>
>>> Tom - the cotton hat is to block UV radiation, not alpha, beta or gamma particles. For
>>> those you'll need your tinfoil akubra.
>> Gamma, alpha and beta particles are readily absorbed at the upper levels of the ionosphere
>> and magnetosphere.  Otherwise earth would be a rocky, slushy ball of lifeless muck....
>>
>
> Ahhh, another one that didn't see the memo.....
>
> Quote/ [From:
> http://science.nasa.gov/science-news/science-at-nasa/2008/16dec_giantbreach/]
> .On June 3, 2007 NASA's five THEMIS spacecraft discovered a breach in Earth's
> magnetic field ten times larger than anything previously thought to exist. Solar
> wind can flow in through the opening to "load up" the magnetosphere

Saw the memo, wasn't relevent. The solar wind is not alpha/beta/gamma particles, and
the magnetosphere is still sufficiently far away that any ionising alpha/beta/gamma
radiation is absorbed before reaching people. Alpha particles in particular have a
range of  only a few centimetres in air, and are blocked by skin.
 
>
> So if the umbrella has holes in it, either you get a new umbrella or you get wet.

Not if the size of the holes is smaller than the wavelength of the incident energy -
you still don't get wet.

And if you are concerned you might be getting wet, you put on that hat I referred to
earlier.

Paul.