Re: general questions about IR

["Dirk Wright" <wright@xxxxxxxxxxxx>]

>I think that you are confusing a few things.  Light is absorbed, 
reflected, or
>refracted.  The connection of infrared with heat has nothing 
whatsoever to do
>with the recording of this through a silver nitrate process.  
Materials that
>may absorb infrared radiation will not respond better or worse to our 
film
>based upon their resultant temperature (unless it gets to the level 
of, say, a
>soldering iron).
>

I'm not suggesting that materials that absorb IR are hotter at the time 
the picture is taken, or that the film is recording temperature. I know 
that IR film does not record temperature. I am asking that if a 
material absorbs IR, as shown by the film as being "not red" in EIR or 
black in HIE, that it will behave in such a way as to be hotter in 
temperature as compared to materials that reflect IR given that each is 
exposed to the same amount if IR light. From experience, I can tell you 
that materials like brick, gravel, asphalt, etc. are much hotter to the 
touch than any living plant material in full sun. Even a thin sheet of 
metal the same mass as a leaf will be hotter to the touch in the same 
light. 

Be seeing you.


Dirk Wright
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