Re: UV vision

[boblong@xxxxxxxxxxx (Robert Long)]

On Tue, 03 Dec 1996 09:15:39 +0000 (GMT), Willem-Jan Markerink wrote:

|>: Also what is the color of the sodium double line (that's the light =
coming from
|>: low pressure sodium vapour light bulbs)?  Most people and most books =
tell me
|>: it is yellow.  I see it orange (like the fruit).

Of course an Edwin Land research team discovered (or, more precisely,
rediscovered) that there is no necessary connection between objective
wavelength and subjective (perceived) color.  Their most remarkable
findings, however, all applied to dark-room situations, where the
viewers were deprived of all white light.

(If anybody's interested, Land published the findings in, I believe,
the September 1959 issue--plus/minus two months--of Scientific
American.)

Bob Long
(boblong@xxxxxxxxxxx)

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Topic No. 11