Re: [OM] planets, green, film, bracketing

[Winsor Crosby]

> I think you mean mercury vapor, right?  Mercury vapor lamps are greenish,
> while the ubiquitious sodium vapor lamps are that horrible shade of
> orange.
>
> Mark Marr-Lyon
I guess it is subjective, but mercury vapor lamps look blue to me 
which is confirmed by
http://isaac.exploratorium.edu/~pauld/summer_institute/summer_day9spectra/spectra_exploration.html

There are different sodium vapor lamps, the low pressure that look 
orange and the high pressure that look yellow.  I have never seen the 
orange ones. The yellow ones which are the choice of the city I live 
in, at least to me, appear to have a pronounced greenish tinge which 
makes them particularly hideous.
--
Winsor Crosby
Long Beach, California

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