From: Sandy King (sanking@hubcap.clemson.edu)
Date: 04/27/00-11:32:46 AM Z
This is very interesting and something I had previously not
understood, though I was intuitively aware of the effect from
practice in dealing with changes of distance in the 2-5 inch range.
However, since the inverse square law does not apply, what does?
Would I be safe to assume the same exposure with a bank of 8 - 4 foot
bulbs at 2 inches from negative as with the bulbs at 8 inches, or
12-20 inches from the negative
Sandy King
>
>John:
>
>The inverse square law applies to point sources only. Once you are
>fairly close to an extended source (such as your bank of 8 - 4 foot
>bulbs) the inverse square law breaks down completely, and your
>observation is absolutely correct - there is no change in intensity
>with a change in distance.
>
>Bummer, huh?
>
>--
>Doug Munson
>Chicago Albumen Works
>[No#] Front Street
>Housatonic, MA 01236
>413.274.6901 (Tel)
>413.274.6934 (Fax)
>dmunson@albumenworks.com
>www.albumenworks.com
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