Bill,
I doubt it. That's the same value given in my dog eared copy of Geldard's
Human Senses from 1953 and he gives no reference for it either.
Al
Al L. Cone
Jamestown College <[EMAIL PROTECTED]>
North Dakota 701.252.3467 X 2604
http://www.jc.edu/users/faculty/cone
-----Original Message-----
From: Goss, Bill [mailto:[EMAIL PROTECTED]]
Sent: Monday, November 08, 1999 9:07 AM
To: 'TIPS'
Subject: threshold
In the intro text I am using (Weiten) there is a statement that the absolute
threshold for human vision is " a candle flame seen at 30 miles on a dark,
clear night." Can someone tell me how this was determined? Did someone
really do a field study on this?
Thanks
---------------------------------------------------
Bill Goss phone:(250) 489-2751, ext. 324
College of the Rockies [EMAIL PROTECTED]
Box 8500
Cranbrook, BC, Canada
V1C 5L7
