• Ultraviolet Photography

Solar Radiation Spectrum

3 replies to this topic

#1 Andrea B.

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Posted 08 July 2017 - 15:41

Giving this chart its own topic for easy reference.

Note the relative lack of UV in the solar spectrum. Look to the left of the violet band beginning at (unmarked) 400 nm.

Attached Image: post-4-0-97702500-1433605108.jpg
Andrea G. Blum
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#2 Mark


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Posted 09 July 2017 - 01:01

No wonder we have to push our (UV) cameras so hard outdoors!

#3 Bill De Jager


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Posted 09 July 2017 - 18:44

And that's with the sun high in the sky and atmospheric attenuation minimized.

I'm wondering about the solar corona at the eclipse next month. The coronal spectrum must be quite different than normal sunlight given the far higher temperature of the corona. UV ought to be dominant, albeit less intense than in normal sunlight. However, I hear that atmospheric turbulence more strongly affects UV than visible light and that could affect coronal photos taken in UV.

Edited by Bill De Jager, 14 July 2017 - 04:49.

#4 Øivind Tøien


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Posted 10 July 2017 - 22:32

I wonder what the spectrum would look like in the 'blue hour". Of course absolute levels would be lower, but what about relative distribution?
UV reception has been suggested to help some animals living at high latitude during low light conditions.