Re: [Leica] Measured Reaction Time / Marvin / Alf / Dave

["Dan Post" <dwpost@email.msn.com>]

Alan,
Interesting thought, that. About the diffeerence in height- I'll have to try
it.
I have seen the green flash, both at sunrise and sunset, while at sea on an
aircraft carrier during my stint in the Nav- we were very used to arising
early in those days!
I asked an astronomer at the university about it and his explanation is that
the refraction of the sun's rays around the edge of the earth, and through
the atmosphere, acts like a large prism. the red is bent the most so you see
the red in the sunrise first. As the sun rises, the angle of this 'prism'
changes, rotating in effect, and as it 'turns' the band of light with the
green portion of the spectrum flashes. More often than not, I have blinked
and missed it, but it is fun trying to catch the 'moment'- never though how
to do it on film, however.
Dan'l

dwpost@msn.com
- -----Original Message-----
From: Alan Hull <hull@vaggeryd.mail.telia.com>
To: leica-users@mejac.palo-alto.ca.us <leica-users@mejac.palo-alto.ca.us>
Date: Tuesday, April 07, 1998 10:46 AM
Subject: Re: [Leica] Measured Reaction Time / Marvin / Alf / Dave