rec.photo.darkroom Discussion: Re: Why is the sky blue?

rec.photo.darkroom Discussion: Re: Why is the sky blue?

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From: Mxsmanic (mxsmanic_at_email.domain.hidden)
Date: Mon Feb 02 2004 - 04:26:00 EST

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jjs writes:

> The atmosphere is not liquid oxygen.

It contains a lot of oxygen, though. Kilometres deep. Things that seem
colorless in a bottle can easily still show color when you are looking
through 2000-metre depths of them.

> The 'color' of oxygen has no meaning here. One does not see
> the color of oxygen in the atmosphere.

How do you know?

> LIght scatters as it travels through the atmosphere. Short
> wavelenghts are not as easily diverted or refracted by the
> atmosphereic molecules and dust. Blue is of a short wavelength.
> Blue is not as easily deflected. That's why you see 'blue'. More
> of the blue part of the pectrum penetrates.

Why isn't the Martian sky blue? What color is the Venusian sky?

> Why does the sky look more red in the evening? Oxygen
> depletion? Of course not.

Red light is twice as long as blue light--it travels over the horizon
more easily.

-- Transpose hotmail and mxsmanic in my e-mail address to reach me directly.

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