Hey, Brent, why do you suppose we never notice a green flash on the setting moon? Should be there, by my reckoning... Chuck __________________________________________________ Do You Yahoo!? Yahoo! Health - your guide to health and wellness http://health.yahoo.com
Good question, Chuck. It may be for a couple of reasons. First, not many people watch the Moon set. Many more watch the sunset. Second, I seem to recall that the green is actually an emission line from Sodium. This may be more muted in a reflection than in an emission. Just a couple of guesses. Brent --- Chuck Hards <chuckhards@yahoo.com> wrote:
Hey, Brent, why do you suppose we never notice a green flash on the setting moon?
Should be there, by my reckoning...
Chuck
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--- Brent Watson <brentjwatson@yahoo.com> wrote:
I seem to recall that the green is actually an emission line from Sodium. This may be more muted in a reflection than in an emission.
That thought occured to me also, but I dismissed it because of the reported green flashes of Venus, which is also a reflection. That leaves intensity. The (fully illuminated) lunar surface is much dimmer than that of Venus, per unit area. What do you think? Could contrast be playing a part here? Chuck __________________________________________________ Do You Yahoo!? Yahoo! Health - your guide to health and wellness http://health.yahoo.com
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