[GRLUG] OFF TOPIC - Speaking of Infrared...

[Michael Mol]

On Thu, Jan 28, 2010 at 8:02 PM, Bob Kline <bob.kline at gmail.com> wrote:
> On Thu, Jan 28, 2010 at 6:03 PM, Michael Mol <mikemol at gmail.com> wrote:
>>
>>
>> The chief problem with "darkvision" as it applies to passive near-IR is
>> that there is a lot of ambient near-IR radiation that's not related to
>> warm bodies.
>>
>> In short, your warm body radiation in the near-IR will be there, but
>> largely drowned out by the ambient near-IR radiation.**
>
> The peak wavelength for a human body
> thermal spectrum is 10 microns - in the so
> called long-wave infrared range.  You shine
> if you're standing out in the snow,  but the
> human body is not really very hot.  About
> the same as your house interior, which is
> that temperature, by design. So you don't
> stand out much.
> See http://en.wikipedia.org/wiki/Infrared
>     -- Bob

http://www.flickr.com/photos/28208534@N07/3681419505/in/set-72157620862996406/

I don't?


-- 
:wq