[AZ-Observing] Re: color is not important was Re: How deep can you see?
- From: "cvsc1" <cvsc1@xxxxxxxxxxxx>
- To: <az-observing@xxxxxxxxxxxxx>
- Date: Sat, 14 Dec 2002 17:34:33 -0600
As follow-up and for clarification
Where I stated
>As illumination is increased the cones start to react and discern color while
>the rods begin to protect themselves by bleaching out the pigmentation within
>the eye, which is responsible for the increased sensitivity.
This is to imply that a fully dark adapted eye has reached full pigmentation
level.
And
>Summary:
>If you have enough light intensity to differentiate color your are degrading
>your light adapted eye-sight.
Should have been
dark adapted eye-sight.
as follow-up,
the preference toward a light which emits in the red spectrum is attributed to
shortened exposure time to a more intense light.
Jack still said it best!
have a great day, and a clear night
Stan Clark
33.43N, 112.35 W
Saguaro Astronomy Club
Webmaster
www.saguaroastro.org
---------- Original Message ----------------------------------
From: "cvsc1" <cvsc1@xxxxxxxxxxxx>
Reply-To: az-observing@xxxxxxxxxxxxx
Date: Sat, 14 Dec 2002 15:36:48 -0600
>
>Generalizations from an up-coming article for the SAC web site.
>Taken from lecture notes on Color Theory and the Human Eye.
>
>The eye is comprised of two sets of photo-receptors.
>They are called rods and cones.
>Rods are responsible for illumination intensity.
>Cones are responsible for color.
>The eye is most sensitive to greenish-yellow light, however cones respond
>quickest to red light.
>
>Under low light levels, the rods are the primary receptors and the cones are
>in effect not functioning.
>
>As illumination is increased the cones start to react and discern color while
>the rods begin to protect themselves by bleaching out the pigmentation within
>the eye, which is responsible for the increased sensitivity.
>
>Summary:
>If you have enough light intensity to differentiate color your are degrading
>your light adapted eye-sight.
>The reason for the red light, is simple your eye adjusts to it's spectrum
>quicker, thus improving your adaptation to light.
>
>Color in less important than intensity of light.
>
>Jack put it right when he said
>> I would use dim any color rather than these crimson beacons I see out there
>> some times.
>
>--
>have a great day, and a clear night
>Stan Clark
>33.43N, 112.35 W
>Saguaro Astronomy Club
>Webmaster
>www.saguaroastro.org
>--
>--
>See message header for info on list archives or unsubscribing, and please
>send personal replies to the author, not the list.
>
>
--
See message header for info on list archives or unsubscribing, and please
send personal replies to the author, not the list.
Other related posts:
