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Author Topic: It's a Fogbow!  (Read 2345 times)

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Offline niko

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It's a Fogbow!
« on: November 23, 2016, 03:45:19 AM »
BBC picture and article.

Offline 4wd

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Re: It's a Fogbow!
« Reply #1 on: November 23, 2016, 01:35:53 PM »
Are we not just seeing part of a halo effect here?
I don't see how fog makes a rainbow without a spectrum unless it's ice particles.

Bashy

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Re: It's a Fogbow!
« Reply #2 on: November 23, 2016, 03:00:53 PM »
Tis amazing, lucky man being in the right place at the right time,
tis lovely up there, more so when the snow is around :)
Done a bit of climbing a bit further up in Glencoe :)

Offline niko

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Re: It's a Fogbow!
« Reply #3 on: November 23, 2016, 03:08:43 PM »
Are we not just seeing part of a halo effect here?
I don't see how fog makes a rainbow without a spectrum unless it's ice particles.

According to NASA it's because the water drops are too small to act as prisms.

"The fogbow's relative lack of colors are caused by the relatively smaller water drops. The drops .. are so small that the quantum mechanical wavelength of light becomes important and smears out colors that would be created by larger rainbow water drops acting like small prisms reflecting sunlight."

Offline 4wd

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Re: It's a Fogbow!
« Reply #4 on: November 23, 2016, 04:20:37 PM »
Interesting thanks  :D

 

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