Re: IR filters

[quk@isham-research.demon.co.uk (Phil Payne)]

In message <19980918000812.28207.qmail@hotmail.com> "scott miller" writes:

> Dunno, on a sunny day there's already a lot of IR coming off a car.
> Also, this IR power must be spread out to cover likely directions to be
> defended against.  It'll lose power very rapidly with distance.

The same inverse square law that also applies to the reflected
radiation.  The ratio between their strengths is independent of
distance.

--
 Phil Payne
 Phone: 0385 302803   Fax: 01536 723021
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