[LRflex] Re: Was: Comparison of M8 Photos in Infra-Red - is now "rubbish?"
- From: "Dave Saalsaa" <dsaalsaa@xxxxxxxxxxxxx>
- To: <leicareflex@xxxxxxxxxxxxx>
- Date: Tue, 21 Nov 2006 14:39:50 -0600
The desert is not always hot. It is dry though. Dark clothing will absorb
heat much faster than white. The reason the people in the desert countries
wear dark clothing may have nothing to do with actual heat protection as
much as it does in tradition and custom.
Dave
----- Original Message -----
From: "Philippe Amard" <phamard@xxxxxxxxxxxxxx>
To: <leicareflex@xxxxxxxxxxxxx>
Sent: Tuesday, November 21, 2006 2:27 PM
Subject: [LRflex] Re: Was: Comparison of M8 Photos in Infra-Red - is now
"rubbish?"
> Hi Tom,
> may I maintain that dark wolour transfer heat (or cold) faster?
> This is science, not me.
> Hence plenty of applications in the real world, your example is just one
> in many.But when the bag gets hot, it takes much longer to cool down,
> that's the downside of it.
> BTW why do you think the people in the Sahara desert dress in dark
> clothes?
> They must have had time to have "hands-on-experience", long before
> scientists got any interest in that.
> Yours
> Phil
> PS: B&W whisky is a perfect balance of both worlds. ;-)
>
>
>
> Thomas Schofield wrote:
>
>>I thought black v. white for heat transfer only
>>applied to sunlight, not to two different color items
>>in a covered, boiling pot, but i can't say I've tried
>>your experiment. White reflects sunlight, black
>>absorbs it. Zone VI made their camera bag white for
>>this reason.
>>
>>Tom
>>
>>--- Philippe Amard <phamard@xxxxxxxxxxxxxx> wrote:
>>
>>
>>
>>>David Young wrote:
>>>
>>>
>>>
>>>>blacks absorb heat (more than, say, white)
>>>>
>>>>
>>>>
>>>>
>>>Phil jesting and of course, off course, of topic -
>>>please delete before
>>>reading.
>>>
>>>Breakfast:
>>>Have you ever tried painting an egg black and
>>>boiling it with a white egg?
>>>Which is ready first?
>>>Depends on altitude? Nope!
>>>
>>>Dark colours tranfer heat much faster than light
>>>ones (both ways by the
>>>way, i.e. in/out) - Black egg will be ready first,
>>>and cold first -
>>>think of it when buying a car, or a Leica.
>>>This was just to show off how scientific I can get
>>>on the aftermath of
>>>my birthday when I got (thank you ever so much
>>>David) a new autofocus,
>>>stabilized Leica zoom.
>>>
>>>Cheers
>>>Phil (so delighted at the prospect that David can
>>>post more beautiful
>>>shots soon)
>>>
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>>>
>>
>>
>>
>>
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>
>
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